Transcript Job Costing Sample Questions
Slide 1
Carpentry & Joinery
Phase4 Maths
Job Costing
Sample Questions
& Solutions
Carpentry & Joinery
Phase4 Maths
Job Costing
• The total cost of a job came to €3,645
• Calculate the cost of each component to
the nearest cent if the costs were broken
down as follows:
• Materials 1/3
• Labour 5/12
• Profit margin 1/6
• VAT 1/12
Carpentry & Joinery
Phase4 Maths
Job Costing
Convert fraction to %
(divide top by bottom)
Component
Fraction
of Cost
Cost
%
Materials
33.3
33.3% of 3645 = €1,213.77
Labour
41.7
41.7% of 3645 = €1,519.97
Profit margin
16.7
16.7% 0f 3645 = € 608.72
VAT
8.3
8.3% of 3645 = € 302.54
Carpentry & Joinery
Phase 4
Module 3 Unit 6
Job Costing
• Three carpenters work for 2 weeks constructing a
roof. They work 9 hours a day for 4 days and 8
hours on the fifth day each week. From the table
below, calculate the net pay for the three
carpenters after allowances and deductions.
Standard Hourly
rate
€ 22
Standard
working week
39 hours
Overtime rate
11/2 standard
hourly rate
Tool allowance
(taxable)
€1.55 / day
Meal allowance
(taxable)
€1.80 / day
Tax
21%
Carpentry & Joinery
Phase 4
Module 3 Unit 6
Job Costing
Total hours = 4 x 9 + 8 = 44
Standard Hourly
rate
€ 22
44 – 39 = 5 hours (overtime)
Standard
working week
39 hours
€22 x 39 = €858
Overtime rate
11/
standard
hourly rate
€1.55 x 5 (days) = €7.75
Tool allowance
(taxable)
€1.55 / day
€1.8 x 5 (days) = €9
Meal allowance
(taxable)
€1.80 / day
Total Gross = €1,039.75
Tax
21%
- Tax @ 21% =
€218.35
Net wage
=
€821.40
X3
= €2,464.20 Answer
€33 x 5
2
= €165 (hourly rate x 1.5)
NB* always take the time to read each question fully to be sure of what answer
is required. In this example, the total for the 3 carpenters was requested.
Carpentry & Joinery
Phase 4
Module 3 Unit 6
Job Costing
• It takes 3,000 meters of flooring to complete one
house. How much would it cost to floor 18 houses
given the following information?
Component
Cost
Cost for 1
house
Flooring
€0.25 per metre run. (Less 2% trade
discount) 0.25 x 3,000 = €750 2% = 15
Labour
15 hours for each floor @ €25 per hour
Overheads
38% of labour costs
€375
€142.50
Subtotal
V.A.T.
750 -15 (2%)
= €735
€1,252.50
€125.25
+10%
Total for 1 house
€1,377.75
Total for 18 houses
€24,799.50
Slide 2
Carpentry & Joinery
Phase4 Maths
Job Costing
Sample Questions
& Solutions
Carpentry & Joinery
Phase4 Maths
Job Costing
• The total cost of a job came to €3,645
• Calculate the cost of each component to
the nearest cent if the costs were broken
down as follows:
• Materials 1/3
• Labour 5/12
• Profit margin 1/6
• VAT 1/12
Carpentry & Joinery
Phase4 Maths
Job Costing
Convert fraction to %
(divide top by bottom)
Component
Fraction
of Cost
Cost
%
Materials
33.3
33.3% of 3645 = €1,213.77
Labour
41.7
41.7% of 3645 = €1,519.97
Profit margin
16.7
16.7% 0f 3645 = € 608.72
VAT
8.3
8.3% of 3645 = € 302.54
Carpentry & Joinery
Phase 4
Module 3 Unit 6
Job Costing
• Three carpenters work for 2 weeks constructing a
roof. They work 9 hours a day for 4 days and 8
hours on the fifth day each week. From the table
below, calculate the net pay for the three
carpenters after allowances and deductions.
Standard Hourly
rate
€ 22
Standard
working week
39 hours
Overtime rate
11/2 standard
hourly rate
Tool allowance
(taxable)
€1.55 / day
Meal allowance
(taxable)
€1.80 / day
Tax
21%
Carpentry & Joinery
Phase 4
Module 3 Unit 6
Job Costing
Total hours = 4 x 9 + 8 = 44
Standard Hourly
rate
€ 22
44 – 39 = 5 hours (overtime)
Standard
working week
39 hours
€22 x 39 = €858
Overtime rate
11/
standard
hourly rate
€1.55 x 5 (days) = €7.75
Tool allowance
(taxable)
€1.55 / day
€1.8 x 5 (days) = €9
Meal allowance
(taxable)
€1.80 / day
Total Gross = €1,039.75
Tax
21%
- Tax @ 21% =
€218.35
Net wage
=
€821.40
X3
= €2,464.20 Answer
€33 x 5
2
= €165 (hourly rate x 1.5)
NB* always take the time to read each question fully to be sure of what answer
is required. In this example, the total for the 3 carpenters was requested.
Carpentry & Joinery
Phase 4
Module 3 Unit 6
Job Costing
• It takes 3,000 meters of flooring to complete one
house. How much would it cost to floor 18 houses
given the following information?
Component
Cost
Cost for 1
house
Flooring
€0.25 per metre run. (Less 2% trade
discount) 0.25 x 3,000 = €750 2% = 15
Labour
15 hours for each floor @ €25 per hour
Overheads
38% of labour costs
€375
€142.50
Subtotal
V.A.T.
750 -15 (2%)
= €735
€1,252.50
€125.25
+10%
Total for 1 house
€1,377.75
Total for 18 houses
€24,799.50
Slide 3
Carpentry & Joinery
Phase4 Maths
Job Costing
Sample Questions
& Solutions
Carpentry & Joinery
Phase4 Maths
Job Costing
• The total cost of a job came to €3,645
• Calculate the cost of each component to
the nearest cent if the costs were broken
down as follows:
• Materials 1/3
• Labour 5/12
• Profit margin 1/6
• VAT 1/12
Carpentry & Joinery
Phase4 Maths
Job Costing
Convert fraction to %
(divide top by bottom)
Component
Fraction
of Cost
Cost
%
Materials
33.3
33.3% of 3645 = €1,213.77
Labour
41.7
41.7% of 3645 = €1,519.97
Profit margin
16.7
16.7% 0f 3645 = € 608.72
VAT
8.3
8.3% of 3645 = € 302.54
Carpentry & Joinery
Phase 4
Module 3 Unit 6
Job Costing
• Three carpenters work for 2 weeks constructing a
roof. They work 9 hours a day for 4 days and 8
hours on the fifth day each week. From the table
below, calculate the net pay for the three
carpenters after allowances and deductions.
Standard Hourly
rate
€ 22
Standard
working week
39 hours
Overtime rate
11/2 standard
hourly rate
Tool allowance
(taxable)
€1.55 / day
Meal allowance
(taxable)
€1.80 / day
Tax
21%
Carpentry & Joinery
Phase 4
Module 3 Unit 6
Job Costing
Total hours = 4 x 9 + 8 = 44
Standard Hourly
rate
€ 22
44 – 39 = 5 hours (overtime)
Standard
working week
39 hours
€22 x 39 = €858
Overtime rate
11/
standard
hourly rate
€1.55 x 5 (days) = €7.75
Tool allowance
(taxable)
€1.55 / day
€1.8 x 5 (days) = €9
Meal allowance
(taxable)
€1.80 / day
Total Gross = €1,039.75
Tax
21%
- Tax @ 21% =
€218.35
Net wage
=
€821.40
X3
= €2,464.20 Answer
€33 x 5
2
= €165 (hourly rate x 1.5)
NB* always take the time to read each question fully to be sure of what answer
is required. In this example, the total for the 3 carpenters was requested.
Carpentry & Joinery
Phase 4
Module 3 Unit 6
Job Costing
• It takes 3,000 meters of flooring to complete one
house. How much would it cost to floor 18 houses
given the following information?
Component
Cost
Cost for 1
house
Flooring
€0.25 per metre run. (Less 2% trade
discount) 0.25 x 3,000 = €750 2% = 15
Labour
15 hours for each floor @ €25 per hour
Overheads
38% of labour costs
€375
€142.50
Subtotal
V.A.T.
750 -15 (2%)
= €735
€1,252.50
€125.25
+10%
Total for 1 house
€1,377.75
Total for 18 houses
€24,799.50
Slide 4
Carpentry & Joinery
Phase4 Maths
Job Costing
Sample Questions
& Solutions
Carpentry & Joinery
Phase4 Maths
Job Costing
• The total cost of a job came to €3,645
• Calculate the cost of each component to
the nearest cent if the costs were broken
down as follows:
• Materials 1/3
• Labour 5/12
• Profit margin 1/6
• VAT 1/12
Carpentry & Joinery
Phase4 Maths
Job Costing
Convert fraction to %
(divide top by bottom)
Component
Fraction
of Cost
Cost
%
Materials
33.3
33.3% of 3645 = €1,213.77
Labour
41.7
41.7% of 3645 = €1,519.97
Profit margin
16.7
16.7% 0f 3645 = € 608.72
VAT
8.3
8.3% of 3645 = € 302.54
Carpentry & Joinery
Phase 4
Module 3 Unit 6
Job Costing
• Three carpenters work for 2 weeks constructing a
roof. They work 9 hours a day for 4 days and 8
hours on the fifth day each week. From the table
below, calculate the net pay for the three
carpenters after allowances and deductions.
Standard Hourly
rate
€ 22
Standard
working week
39 hours
Overtime rate
11/2 standard
hourly rate
Tool allowance
(taxable)
€1.55 / day
Meal allowance
(taxable)
€1.80 / day
Tax
21%
Carpentry & Joinery
Phase 4
Module 3 Unit 6
Job Costing
Total hours = 4 x 9 + 8 = 44
Standard Hourly
rate
€ 22
44 – 39 = 5 hours (overtime)
Standard
working week
39 hours
€22 x 39 = €858
Overtime rate
11/
standard
hourly rate
€1.55 x 5 (days) = €7.75
Tool allowance
(taxable)
€1.55 / day
€1.8 x 5 (days) = €9
Meal allowance
(taxable)
€1.80 / day
Total Gross = €1,039.75
Tax
21%
- Tax @ 21% =
€218.35
Net wage
=
€821.40
X3
= €2,464.20 Answer
€33 x 5
2
= €165 (hourly rate x 1.5)
NB* always take the time to read each question fully to be sure of what answer
is required. In this example, the total for the 3 carpenters was requested.
Carpentry & Joinery
Phase 4
Module 3 Unit 6
Job Costing
• It takes 3,000 meters of flooring to complete one
house. How much would it cost to floor 18 houses
given the following information?
Component
Cost
Cost for 1
house
Flooring
€0.25 per metre run. (Less 2% trade
discount) 0.25 x 3,000 = €750 2% = 15
Labour
15 hours for each floor @ €25 per hour
Overheads
38% of labour costs
€375
€142.50
Subtotal
V.A.T.
750 -15 (2%)
= €735
€1,252.50
€125.25
+10%
Total for 1 house
€1,377.75
Total for 18 houses
€24,799.50
Slide 5
Carpentry & Joinery
Phase4 Maths
Job Costing
Sample Questions
& Solutions
Carpentry & Joinery
Phase4 Maths
Job Costing
• The total cost of a job came to €3,645
• Calculate the cost of each component to
the nearest cent if the costs were broken
down as follows:
• Materials 1/3
• Labour 5/12
• Profit margin 1/6
• VAT 1/12
Carpentry & Joinery
Phase4 Maths
Job Costing
Convert fraction to %
(divide top by bottom)
Component
Fraction
of Cost
Cost
%
Materials
33.3
33.3% of 3645 = €1,213.77
Labour
41.7
41.7% of 3645 = €1,519.97
Profit margin
16.7
16.7% 0f 3645 = € 608.72
VAT
8.3
8.3% of 3645 = € 302.54
Carpentry & Joinery
Phase 4
Module 3 Unit 6
Job Costing
• Three carpenters work for 2 weeks constructing a
roof. They work 9 hours a day for 4 days and 8
hours on the fifth day each week. From the table
below, calculate the net pay for the three
carpenters after allowances and deductions.
Standard Hourly
rate
€ 22
Standard
working week
39 hours
Overtime rate
11/2 standard
hourly rate
Tool allowance
(taxable)
€1.55 / day
Meal allowance
(taxable)
€1.80 / day
Tax
21%
Carpentry & Joinery
Phase 4
Module 3 Unit 6
Job Costing
Total hours = 4 x 9 + 8 = 44
Standard Hourly
rate
€ 22
44 – 39 = 5 hours (overtime)
Standard
working week
39 hours
€22 x 39 = €858
Overtime rate
11/
standard
hourly rate
€1.55 x 5 (days) = €7.75
Tool allowance
(taxable)
€1.55 / day
€1.8 x 5 (days) = €9
Meal allowance
(taxable)
€1.80 / day
Total Gross = €1,039.75
Tax
21%
- Tax @ 21% =
€218.35
Net wage
=
€821.40
X3
= €2,464.20 Answer
€33 x 5
2
= €165 (hourly rate x 1.5)
NB* always take the time to read each question fully to be sure of what answer
is required. In this example, the total for the 3 carpenters was requested.
Carpentry & Joinery
Phase 4
Module 3 Unit 6
Job Costing
• It takes 3,000 meters of flooring to complete one
house. How much would it cost to floor 18 houses
given the following information?
Component
Cost
Cost for 1
house
Flooring
€0.25 per metre run. (Less 2% trade
discount) 0.25 x 3,000 = €750 2% = 15
Labour
15 hours for each floor @ €25 per hour
Overheads
38% of labour costs
€375
€142.50
Subtotal
V.A.T.
750 -15 (2%)
= €735
€1,252.50
€125.25
+10%
Total for 1 house
€1,377.75
Total for 18 houses
€24,799.50
Slide 6
Carpentry & Joinery
Phase4 Maths
Job Costing
Sample Questions
& Solutions
Carpentry & Joinery
Phase4 Maths
Job Costing
• The total cost of a job came to €3,645
• Calculate the cost of each component to
the nearest cent if the costs were broken
down as follows:
• Materials 1/3
• Labour 5/12
• Profit margin 1/6
• VAT 1/12
Carpentry & Joinery
Phase4 Maths
Job Costing
Convert fraction to %
(divide top by bottom)
Component
Fraction
of Cost
Cost
%
Materials
33.3
33.3% of 3645 = €1,213.77
Labour
41.7
41.7% of 3645 = €1,519.97
Profit margin
16.7
16.7% 0f 3645 = € 608.72
VAT
8.3
8.3% of 3645 = € 302.54
Carpentry & Joinery
Phase 4
Module 3 Unit 6
Job Costing
• Three carpenters work for 2 weeks constructing a
roof. They work 9 hours a day for 4 days and 8
hours on the fifth day each week. From the table
below, calculate the net pay for the three
carpenters after allowances and deductions.
Standard Hourly
rate
€ 22
Standard
working week
39 hours
Overtime rate
11/2 standard
hourly rate
Tool allowance
(taxable)
€1.55 / day
Meal allowance
(taxable)
€1.80 / day
Tax
21%
Carpentry & Joinery
Phase 4
Module 3 Unit 6
Job Costing
Total hours = 4 x 9 + 8 = 44
Standard Hourly
rate
€ 22
44 – 39 = 5 hours (overtime)
Standard
working week
39 hours
€22 x 39 = €858
Overtime rate
11/
standard
hourly rate
€1.55 x 5 (days) = €7.75
Tool allowance
(taxable)
€1.55 / day
€1.8 x 5 (days) = €9
Meal allowance
(taxable)
€1.80 / day
Total Gross = €1,039.75
Tax
21%
- Tax @ 21% =
€218.35
Net wage
=
€821.40
X3
= €2,464.20 Answer
€33 x 5
2
= €165 (hourly rate x 1.5)
NB* always take the time to read each question fully to be sure of what answer
is required. In this example, the total for the 3 carpenters was requested.
Carpentry & Joinery
Phase 4
Module 3 Unit 6
Job Costing
• It takes 3,000 meters of flooring to complete one
house. How much would it cost to floor 18 houses
given the following information?
Component
Cost
Cost for 1
house
Flooring
€0.25 per metre run. (Less 2% trade
discount) 0.25 x 3,000 = €750 2% = 15
Labour
15 hours for each floor @ €25 per hour
Overheads
38% of labour costs
€375
€142.50
Subtotal
V.A.T.
750 -15 (2%)
= €735
€1,252.50
€125.25
+10%
Total for 1 house
€1,377.75
Total for 18 houses
€24,799.50
Carpentry & Joinery
Phase4 Maths
Job Costing
Sample Questions
& Solutions
Carpentry & Joinery
Phase4 Maths
Job Costing
• The total cost of a job came to €3,645
• Calculate the cost of each component to
the nearest cent if the costs were broken
down as follows:
• Materials 1/3
• Labour 5/12
• Profit margin 1/6
• VAT 1/12
Carpentry & Joinery
Phase4 Maths
Job Costing
Convert fraction to %
(divide top by bottom)
Component
Fraction
of Cost
Cost
%
Materials
33.3
33.3% of 3645 = €1,213.77
Labour
41.7
41.7% of 3645 = €1,519.97
Profit margin
16.7
16.7% 0f 3645 = € 608.72
VAT
8.3
8.3% of 3645 = € 302.54
Carpentry & Joinery
Phase 4
Module 3 Unit 6
Job Costing
• Three carpenters work for 2 weeks constructing a
roof. They work 9 hours a day for 4 days and 8
hours on the fifth day each week. From the table
below, calculate the net pay for the three
carpenters after allowances and deductions.
Standard Hourly
rate
€ 22
Standard
working week
39 hours
Overtime rate
11/2 standard
hourly rate
Tool allowance
(taxable)
€1.55 / day
Meal allowance
(taxable)
€1.80 / day
Tax
21%
Carpentry & Joinery
Phase 4
Module 3 Unit 6
Job Costing
Total hours = 4 x 9 + 8 = 44
Standard Hourly
rate
€ 22
44 – 39 = 5 hours (overtime)
Standard
working week
39 hours
€22 x 39 = €858
Overtime rate
11/
standard
hourly rate
€1.55 x 5 (days) = €7.75
Tool allowance
(taxable)
€1.55 / day
€1.8 x 5 (days) = €9
Meal allowance
(taxable)
€1.80 / day
Total Gross = €1,039.75
Tax
21%
- Tax @ 21% =
€218.35
Net wage
=
€821.40
X3
= €2,464.20 Answer
€33 x 5
2
= €165 (hourly rate x 1.5)
NB* always take the time to read each question fully to be sure of what answer
is required. In this example, the total for the 3 carpenters was requested.
Carpentry & Joinery
Phase 4
Module 3 Unit 6
Job Costing
• It takes 3,000 meters of flooring to complete one
house. How much would it cost to floor 18 houses
given the following information?
Component
Cost
Cost for 1
house
Flooring
€0.25 per metre run. (Less 2% trade
discount) 0.25 x 3,000 = €750 2% = 15
Labour
15 hours for each floor @ €25 per hour
Overheads
38% of labour costs
€375
€142.50
Subtotal
V.A.T.
750 -15 (2%)
= €735
€1,252.50
€125.25
+10%
Total for 1 house
€1,377.75
Total for 18 houses
€24,799.50
Slide 2
Carpentry & Joinery
Phase4 Maths
Job Costing
Sample Questions
& Solutions
Carpentry & Joinery
Phase4 Maths
Job Costing
• The total cost of a job came to €3,645
• Calculate the cost of each component to
the nearest cent if the costs were broken
down as follows:
• Materials 1/3
• Labour 5/12
• Profit margin 1/6
• VAT 1/12
Carpentry & Joinery
Phase4 Maths
Job Costing
Convert fraction to %
(divide top by bottom)
Component
Fraction
of Cost
Cost
%
Materials
33.3
33.3% of 3645 = €1,213.77
Labour
41.7
41.7% of 3645 = €1,519.97
Profit margin
16.7
16.7% 0f 3645 = € 608.72
VAT
8.3
8.3% of 3645 = € 302.54
Carpentry & Joinery
Phase 4
Module 3 Unit 6
Job Costing
• Three carpenters work for 2 weeks constructing a
roof. They work 9 hours a day for 4 days and 8
hours on the fifth day each week. From the table
below, calculate the net pay for the three
carpenters after allowances and deductions.
Standard Hourly
rate
€ 22
Standard
working week
39 hours
Overtime rate
11/2 standard
hourly rate
Tool allowance
(taxable)
€1.55 / day
Meal allowance
(taxable)
€1.80 / day
Tax
21%
Carpentry & Joinery
Phase 4
Module 3 Unit 6
Job Costing
Total hours = 4 x 9 + 8 = 44
Standard Hourly
rate
€ 22
44 – 39 = 5 hours (overtime)
Standard
working week
39 hours
€22 x 39 = €858
Overtime rate
11/
standard
hourly rate
€1.55 x 5 (days) = €7.75
Tool allowance
(taxable)
€1.55 / day
€1.8 x 5 (days) = €9
Meal allowance
(taxable)
€1.80 / day
Total Gross = €1,039.75
Tax
21%
- Tax @ 21% =
€218.35
Net wage
=
€821.40
X3
= €2,464.20 Answer
€33 x 5
2
= €165 (hourly rate x 1.5)
NB* always take the time to read each question fully to be sure of what answer
is required. In this example, the total for the 3 carpenters was requested.
Carpentry & Joinery
Phase 4
Module 3 Unit 6
Job Costing
• It takes 3,000 meters of flooring to complete one
house. How much would it cost to floor 18 houses
given the following information?
Component
Cost
Cost for 1
house
Flooring
€0.25 per metre run. (Less 2% trade
discount) 0.25 x 3,000 = €750 2% = 15
Labour
15 hours for each floor @ €25 per hour
Overheads
38% of labour costs
€375
€142.50
Subtotal
V.A.T.
750 -15 (2%)
= €735
€1,252.50
€125.25
+10%
Total for 1 house
€1,377.75
Total for 18 houses
€24,799.50
Slide 3
Carpentry & Joinery
Phase4 Maths
Job Costing
Sample Questions
& Solutions
Carpentry & Joinery
Phase4 Maths
Job Costing
• The total cost of a job came to €3,645
• Calculate the cost of each component to
the nearest cent if the costs were broken
down as follows:
• Materials 1/3
• Labour 5/12
• Profit margin 1/6
• VAT 1/12
Carpentry & Joinery
Phase4 Maths
Job Costing
Convert fraction to %
(divide top by bottom)
Component
Fraction
of Cost
Cost
%
Materials
33.3
33.3% of 3645 = €1,213.77
Labour
41.7
41.7% of 3645 = €1,519.97
Profit margin
16.7
16.7% 0f 3645 = € 608.72
VAT
8.3
8.3% of 3645 = € 302.54
Carpentry & Joinery
Phase 4
Module 3 Unit 6
Job Costing
• Three carpenters work for 2 weeks constructing a
roof. They work 9 hours a day for 4 days and 8
hours on the fifth day each week. From the table
below, calculate the net pay for the three
carpenters after allowances and deductions.
Standard Hourly
rate
€ 22
Standard
working week
39 hours
Overtime rate
11/2 standard
hourly rate
Tool allowance
(taxable)
€1.55 / day
Meal allowance
(taxable)
€1.80 / day
Tax
21%
Carpentry & Joinery
Phase 4
Module 3 Unit 6
Job Costing
Total hours = 4 x 9 + 8 = 44
Standard Hourly
rate
€ 22
44 – 39 = 5 hours (overtime)
Standard
working week
39 hours
€22 x 39 = €858
Overtime rate
11/
standard
hourly rate
€1.55 x 5 (days) = €7.75
Tool allowance
(taxable)
€1.55 / day
€1.8 x 5 (days) = €9
Meal allowance
(taxable)
€1.80 / day
Total Gross = €1,039.75
Tax
21%
- Tax @ 21% =
€218.35
Net wage
=
€821.40
X3
= €2,464.20 Answer
€33 x 5
2
= €165 (hourly rate x 1.5)
NB* always take the time to read each question fully to be sure of what answer
is required. In this example, the total for the 3 carpenters was requested.
Carpentry & Joinery
Phase 4
Module 3 Unit 6
Job Costing
• It takes 3,000 meters of flooring to complete one
house. How much would it cost to floor 18 houses
given the following information?
Component
Cost
Cost for 1
house
Flooring
€0.25 per metre run. (Less 2% trade
discount) 0.25 x 3,000 = €750 2% = 15
Labour
15 hours for each floor @ €25 per hour
Overheads
38% of labour costs
€375
€142.50
Subtotal
V.A.T.
750 -15 (2%)
= €735
€1,252.50
€125.25
+10%
Total for 1 house
€1,377.75
Total for 18 houses
€24,799.50
Slide 4
Carpentry & Joinery
Phase4 Maths
Job Costing
Sample Questions
& Solutions
Carpentry & Joinery
Phase4 Maths
Job Costing
• The total cost of a job came to €3,645
• Calculate the cost of each component to
the nearest cent if the costs were broken
down as follows:
• Materials 1/3
• Labour 5/12
• Profit margin 1/6
• VAT 1/12
Carpentry & Joinery
Phase4 Maths
Job Costing
Convert fraction to %
(divide top by bottom)
Component
Fraction
of Cost
Cost
%
Materials
33.3
33.3% of 3645 = €1,213.77
Labour
41.7
41.7% of 3645 = €1,519.97
Profit margin
16.7
16.7% 0f 3645 = € 608.72
VAT
8.3
8.3% of 3645 = € 302.54
Carpentry & Joinery
Phase 4
Module 3 Unit 6
Job Costing
• Three carpenters work for 2 weeks constructing a
roof. They work 9 hours a day for 4 days and 8
hours on the fifth day each week. From the table
below, calculate the net pay for the three
carpenters after allowances and deductions.
Standard Hourly
rate
€ 22
Standard
working week
39 hours
Overtime rate
11/2 standard
hourly rate
Tool allowance
(taxable)
€1.55 / day
Meal allowance
(taxable)
€1.80 / day
Tax
21%
Carpentry & Joinery
Phase 4
Module 3 Unit 6
Job Costing
Total hours = 4 x 9 + 8 = 44
Standard Hourly
rate
€ 22
44 – 39 = 5 hours (overtime)
Standard
working week
39 hours
€22 x 39 = €858
Overtime rate
11/
standard
hourly rate
€1.55 x 5 (days) = €7.75
Tool allowance
(taxable)
€1.55 / day
€1.8 x 5 (days) = €9
Meal allowance
(taxable)
€1.80 / day
Total Gross = €1,039.75
Tax
21%
- Tax @ 21% =
€218.35
Net wage
=
€821.40
X3
= €2,464.20 Answer
€33 x 5
2
= €165 (hourly rate x 1.5)
NB* always take the time to read each question fully to be sure of what answer
is required. In this example, the total for the 3 carpenters was requested.
Carpentry & Joinery
Phase 4
Module 3 Unit 6
Job Costing
• It takes 3,000 meters of flooring to complete one
house. How much would it cost to floor 18 houses
given the following information?
Component
Cost
Cost for 1
house
Flooring
€0.25 per metre run. (Less 2% trade
discount) 0.25 x 3,000 = €750 2% = 15
Labour
15 hours for each floor @ €25 per hour
Overheads
38% of labour costs
€375
€142.50
Subtotal
V.A.T.
750 -15 (2%)
= €735
€1,252.50
€125.25
+10%
Total for 1 house
€1,377.75
Total for 18 houses
€24,799.50
Slide 5
Carpentry & Joinery
Phase4 Maths
Job Costing
Sample Questions
& Solutions
Carpentry & Joinery
Phase4 Maths
Job Costing
• The total cost of a job came to €3,645
• Calculate the cost of each component to
the nearest cent if the costs were broken
down as follows:
• Materials 1/3
• Labour 5/12
• Profit margin 1/6
• VAT 1/12
Carpentry & Joinery
Phase4 Maths
Job Costing
Convert fraction to %
(divide top by bottom)
Component
Fraction
of Cost
Cost
%
Materials
33.3
33.3% of 3645 = €1,213.77
Labour
41.7
41.7% of 3645 = €1,519.97
Profit margin
16.7
16.7% 0f 3645 = € 608.72
VAT
8.3
8.3% of 3645 = € 302.54
Carpentry & Joinery
Phase 4
Module 3 Unit 6
Job Costing
• Three carpenters work for 2 weeks constructing a
roof. They work 9 hours a day for 4 days and 8
hours on the fifth day each week. From the table
below, calculate the net pay for the three
carpenters after allowances and deductions.
Standard Hourly
rate
€ 22
Standard
working week
39 hours
Overtime rate
11/2 standard
hourly rate
Tool allowance
(taxable)
€1.55 / day
Meal allowance
(taxable)
€1.80 / day
Tax
21%
Carpentry & Joinery
Phase 4
Module 3 Unit 6
Job Costing
Total hours = 4 x 9 + 8 = 44
Standard Hourly
rate
€ 22
44 – 39 = 5 hours (overtime)
Standard
working week
39 hours
€22 x 39 = €858
Overtime rate
11/
standard
hourly rate
€1.55 x 5 (days) = €7.75
Tool allowance
(taxable)
€1.55 / day
€1.8 x 5 (days) = €9
Meal allowance
(taxable)
€1.80 / day
Total Gross = €1,039.75
Tax
21%
- Tax @ 21% =
€218.35
Net wage
=
€821.40
X3
= €2,464.20 Answer
€33 x 5
2
= €165 (hourly rate x 1.5)
NB* always take the time to read each question fully to be sure of what answer
is required. In this example, the total for the 3 carpenters was requested.
Carpentry & Joinery
Phase 4
Module 3 Unit 6
Job Costing
• It takes 3,000 meters of flooring to complete one
house. How much would it cost to floor 18 houses
given the following information?
Component
Cost
Cost for 1
house
Flooring
€0.25 per metre run. (Less 2% trade
discount) 0.25 x 3,000 = €750 2% = 15
Labour
15 hours for each floor @ €25 per hour
Overheads
38% of labour costs
€375
€142.50
Subtotal
V.A.T.
750 -15 (2%)
= €735
€1,252.50
€125.25
+10%
Total for 1 house
€1,377.75
Total for 18 houses
€24,799.50
Slide 6
Carpentry & Joinery
Phase4 Maths
Job Costing
Sample Questions
& Solutions
Carpentry & Joinery
Phase4 Maths
Job Costing
• The total cost of a job came to €3,645
• Calculate the cost of each component to
the nearest cent if the costs were broken
down as follows:
• Materials 1/3
• Labour 5/12
• Profit margin 1/6
• VAT 1/12
Carpentry & Joinery
Phase4 Maths
Job Costing
Convert fraction to %
(divide top by bottom)
Component
Fraction
of Cost
Cost
%
Materials
33.3
33.3% of 3645 = €1,213.77
Labour
41.7
41.7% of 3645 = €1,519.97
Profit margin
16.7
16.7% 0f 3645 = € 608.72
VAT
8.3
8.3% of 3645 = € 302.54
Carpentry & Joinery
Phase 4
Module 3 Unit 6
Job Costing
• Three carpenters work for 2 weeks constructing a
roof. They work 9 hours a day for 4 days and 8
hours on the fifth day each week. From the table
below, calculate the net pay for the three
carpenters after allowances and deductions.
Standard Hourly
rate
€ 22
Standard
working week
39 hours
Overtime rate
11/2 standard
hourly rate
Tool allowance
(taxable)
€1.55 / day
Meal allowance
(taxable)
€1.80 / day
Tax
21%
Carpentry & Joinery
Phase 4
Module 3 Unit 6
Job Costing
Total hours = 4 x 9 + 8 = 44
Standard Hourly
rate
€ 22
44 – 39 = 5 hours (overtime)
Standard
working week
39 hours
€22 x 39 = €858
Overtime rate
11/
standard
hourly rate
€1.55 x 5 (days) = €7.75
Tool allowance
(taxable)
€1.55 / day
€1.8 x 5 (days) = €9
Meal allowance
(taxable)
€1.80 / day
Total Gross = €1,039.75
Tax
21%
- Tax @ 21% =
€218.35
Net wage
=
€821.40
X3
= €2,464.20 Answer
€33 x 5
2
= €165 (hourly rate x 1.5)
NB* always take the time to read each question fully to be sure of what answer
is required. In this example, the total for the 3 carpenters was requested.
Carpentry & Joinery
Phase 4
Module 3 Unit 6
Job Costing
• It takes 3,000 meters of flooring to complete one
house. How much would it cost to floor 18 houses
given the following information?
Component
Cost
Cost for 1
house
Flooring
€0.25 per metre run. (Less 2% trade
discount) 0.25 x 3,000 = €750 2% = 15
Labour
15 hours for each floor @ €25 per hour
Overheads
38% of labour costs
€375
€142.50
Subtotal
V.A.T.
750 -15 (2%)
= €735
€1,252.50
€125.25
+10%
Total for 1 house
€1,377.75
Total for 18 houses
€24,799.50