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1. PERILAKU BIAYA :
Analisis dan Penggunaan
BAB
3

2. © The McGraw-Hill Companies, Inc., 2000Irwin/McGraw-Hill
Types of Cost Behavior Patterns
Summary of Variable and Fixed Cost Behavior
Cost In Total Per Unit
Variable Total variable cost is Variable cost per unit remains
proportional to the activity the same over wide ranges
level within the relevant range. of activity.
Fixed Total fixed cost remains the Fixed cost per unit goes
same even when the activity down as activity level goes up.
level changes within the
relevant range.
Recall the summary of our cost behavior
discussion from Chapter 2.

3. © The McGraw-Hill Companies, Inc., 2000Irwin/McGraw-Hill
Perilaku Biaya
Merchandisers
Cost of Goods Sold
Manufacturers
Direct Material, Direct
Labor, and Variable
Manufacturing Overhead
Merchandisers and
Manufacturers
Sales commissions and
shipping costs
Service Organizations
Supplies and travel
Examples of normally variable costs
Examples of normally fixed costs
Merchandisers, manufacturers, and
service organizations
Real estate taxes, Insurance, Sales salaries
Depreciation, Advertising

4. © The McGraw-Hill Companies, Inc., 2000Irwin/McGraw-Hill
The Activity Base
Machine
hours
Labor
hours
Units
produced
Miles
driven
A measure of the event
causing the incurrence of a
variable cost – a cost driver

5. © The McGraw-Hill Companies, Inc., 2000Irwin/McGraw-Hill
Step-Variable Costs
Activity
Cost
Total cost remains
constant within a
narrow range of
activity.

6. © The McGraw-Hill Companies, Inc., 2000Irwin/McGraw-Hill
Step-Variable Costs
Activity
Cost
Total cost increases to a
new higher cost for the
next higher range of
activity.

7. © The McGraw-Hill Companies, Inc., 2000Irwin/McGraw-Hill
The Linearity Assumption and the
Relevant Range
Activity
TotalCost
Economist’s
Curvilinear Cost
Function

8. © The McGraw-Hill Companies, Inc., 2000Irwin/McGraw-Hill
Activity
TotalCost
Economist’s
Curvilinear Cost
Function
Accountant’s Straight-Line
Approximation (constant
unit variable cost)
The Linearity Assumption and the
Relevant Range

9. © The McGraw-Hill Companies, Inc., 2000Irwin/McGraw-Hill
Activity
TotalCost
Relevant
Range
The Linearity Assumption and the
Relevant Range
Accountant’s Straight-Line
Approximation (constant
unit variable cost)
Economist’s
Curvilinear Cost
Function
A straight line
closely
approximates
a curvilinear
variable cost
line within the
relevant
range.
A straight line
closely
approximates
a curvilinear
variable cost
line within the
relevant
range.

10. © The McGraw-Hill Companies, Inc., 2000Irwin/McGraw-Hill
Types of Fixed Costs
Fixed Costs
Discretionary
May be altered in the
short-term by current
managerial decisions
Committed
Long-term, cannot be
reduced in the short
term.
Examples
Depreciation on
Buildings and
Equipment
Examples
Advertising and
Research and
Development

11. © The McGraw-Hill Companies, Inc., 2000Irwin/McGraw-Hill
Trend Toward Fixed Costs
Increased automation.
Increase in salaried knowledge workers
who are difficult to train and replace.
Implications
Managers are more “locked-in” with fewer decision
alternatives.
Planning becomes more crucial because fixed costs are
difficult to change with current operating decisions.
Implications
Managers are more “locked-in” with fewer decision
alternatives.
Planning becomes more crucial because fixed costs are
difficult to change with current operating decisions.

12. © The McGraw-Hill Companies, Inc., 2000Irwin/McGraw-Hill
Example: Office space
is available at a rental
rate of $30,000 per
year in increments of
1,000 square feet. As
the business grows
more space is rented,
increasing the total
cost.
Fixed Costs and Relevant Range
Continue

13. © The McGraw-Hill Companies, Inc., 2000Irwin/McGraw-Hill
RentCostin
ThousandsofDollars
0 1,000 2,000 3,000
Rented Area (Square Feet)
0
30
60
Fixed Costs and Relevant Range
90
Relevant
Range
Total cost doesn’t
change for a wide
range of activity,
and then jumps to a
new higher cost for
the next higher
range of activity.

14. © The McGraw-Hill Companies, Inc., 2000Irwin/McGraw-Hill
How does this type
of fixed cost differ
from a step-variable
cost?
Step-variable costs
can be adjusted more
quickly and . . .
The width of the
activity steps is much
wider for the fixed
cost.
Fixed Costs and Relevant Range

15. © The McGraw-Hill Companies, Inc., 2000Irwin/McGraw-Hill
A mixed cost
has both fixed
and variable
components.
Mixed Costs
Consider the
following electric
utility example.

16. © The McGraw-Hill Companies, Inc., 2000Irwin/McGraw-Hill
Fixed Monthly
Utility Charge
Variable
Utility Charge
Activity (Kilowatt Hours)
TotalUtilityCost
Mixed Costs
X
Y
Total mixed cost

17. © The McGraw-Hill Companies, Inc., 2000Irwin/McGraw-Hill
Total mixed cost
Y = a + bX
Fixed Monthly
Utility Charge
Variable
Utility Charge
Activity (Kilowatt Hours)
TotalUtilityCost
Mixed Costs
X
Y
The total mixed cost line can be expressed
as an equation: Y = a + bX
Where: Y = the total mixed cost
a = the total fixed cost (the
vertical intercept of the line)
b = the variable cost per unit of
activity (the slope of the line)
X = the level of activity

18. © The McGraw-Hill Companies, Inc., 2000Irwin/McGraw-Hill
Fixed Monthly
Utility Charge
Variable
Utility Charge
Activity (Kilowatt Hours)
TotalUtilityCost
Total mixed cost
Y = a + bX
Mixed Costs
bX
a
X
Y

19. © The McGraw-Hill Companies, Inc., 2000Irwin/McGraw-Hill
The Analysis of Mixed Costs
Engineering Approach
Account Analysis
Scattergraph Method
Least-Square Regression Method
High-Low Method

20. © The McGraw-Hill Companies, Inc., 2000Irwin/McGraw-Hill
Account Analysis
Each account is classified as either
variable or fixed based on the analyst’s
knowledge of how the account behaves.

21. © The McGraw-Hill Companies, Inc., 2000Irwin/McGraw-Hill
Engineering Estimates
Cost estimates are based on an evaluation
of production methods, and material, labor
and overhead requirements.

22. © The McGraw-Hill Companies, Inc., 2000Irwin/McGraw-Hill
WiseCo recorded the following production activity
and maintenance costs for two months:
Using these two levels of activity, compute:
 the variable cost per unit;
 the fixed cost; and then
 express the costs in equation form Y = a + bX.
The High-Low Method
Units Cost
High activity level 9,000 9,700$
Low activity level 5,000 6,100
Change 4,000 3,600$

23. © The McGraw-Hill Companies, Inc., 2000Irwin/McGraw-Hill
 Unit variable cost =
Change in cost
Change in units
Units Cost
High activity level 9,000 9,700$
Low activity level 5,000 6,100
Change 4,000 3,600$
The High-Low Method

24. © The McGraw-Hill Companies, Inc., 2000Irwin/McGraw-Hill
Units Cost
High activity level 9,000 9,700$
Low activity level 5,000 6,100
Change 4,000 3,600$
The High-Low Method
 Unit variable cost = $3,600 ÷ 4,000 units = $0.90 per unit

25. © The McGraw-Hill Companies, Inc., 2000Irwin/McGraw-Hill
Units Cost
High activity level 9,000 9,700$
Low activity level 5,000 6,100
Change 4,000 3,600$
The High-Low Method
 Unit variable cost = $3,600 ÷ 4,000 units = $0.90 per unit
 Fixed cost = Total cost – Total variable cost
Fixed cost = $9,700 – ($0.90 per unit × 9,000 units)
Fixed cost = $9,700 – $8,100 = $1,600

26. © The McGraw-Hill Companies, Inc., 2000Irwin/McGraw-Hill
 Unit variable cost = $3,600 ÷ 4,000 units = $0.90 per unit
 Fixed cost = Total cost – Total variable cost
Fixed cost = $9,700 – ($0.90 per unit × 9,000 units)
Fixed cost = $9,700 – $8,100 = $1,600
 Total cost = Fixed cost + Variable cost (Y = a + bX)
Y = $1,600 + $0.90X
Units Cost
High activity level 9,000 9,700$
Low activity level 5,000 6,100
Change 4,000 3,600$
The High-Low Method

27. © The McGraw-Hill Companies, Inc., 2000Irwin/McGraw-Hill
The Scattergraph Method
Plot the data points on a
graph (total cost vs. activity).
0 1 2 3 4
*
TotalCostin
1,000’sofDollars
10
20
0
*
**
*
*
*
*
*
*
Activity, 1,000’s of Units Produced
X
Y

28. © The McGraw-Hill Companies, Inc., 2000Irwin/McGraw-Hill
The Scattergraph Method
Draw a line through the data points with about an
equal numbers of points above and below the line.
0 1 2 3 4
*
TotalCostin
1,000’sofDollars
10
20
0
*
**
*
*
*
*
*
*
Activity, 1,000’s of Units Produced
X
Y

29. © The McGraw-Hill Companies, Inc., 2000Irwin/McGraw-Hill
The Scattergraph Method
Estimated fixed cost = $10,000
0 1 2 3 4
*
TotalCostin
1,000’sofDollars
10
20
0
*
**
*
*
*
*
*
*
Activity, 1,000’s of Units Produced
X
Y
The slope of this line is the variable unit
cost. (Slope is the change in total cost
for a one unit change in activity).

30. © The McGraw-Hill Companies, Inc., 2000Irwin/McGraw-Hill
The Scattergraph Method
Slope =
Change in cost
Change in units
Horizontal distance is
the change in activity.
0 1 2 3 4
*
TotalCostin
1,000’sofDollars
10
20
0
*
**
*
*
*
*
*
*
Activity, 1,000’s of Units Produced
X
Y
Vertical
distance
is the
change
in cost.

31. © The McGraw-Hill Companies, Inc., 2000Irwin/McGraw-Hill
Accountants and managers
may use computer software
to fit a regression line
through the data points.
The cost analysis objective
is the same: Y = a + bx
Least-Squares Regression Method
Least-squares regression also provides a statistic, called
the adjusted R2
, that is a measure of the goodness
of fit of the regression line to the data points.
Least-squares regression also provides a statistic, called
the adjusted R2
, that is a measure of the goodness
of fit of the regression line to the data points.

32. © The McGraw-Hill Companies, Inc., 2000Irwin/McGraw-Hill
0 1 2 3 4
TotalCost
10
20
0
Activity
*
*
**
*
*
*
**
*
Least-Squares Regression Method
R2
is the percentage of the variation
in total cost explained by the activity.
R2
for this relationship is near
100% since the data points are
very close to the regression line.
X
Y

33. © The McGraw-Hill Companies, Inc., 2000Irwin/McGraw-Hill
Let’s put our
knowledge of cost
behavior to work by
preparing a
contribution format
income statement.
The Contribution Format

34. © The McGraw-Hill Companies, Inc., 2000Irwin/McGraw-Hill
The Contribution Format
Total Unit
Sales Revenue 100,000$ 50$
Less: Variable costs 60,000 30
Contribution margin 40,000$ 20$
Less: Fixed costs 30,000
Net income 10,000$
The contribution margin format emphasizes cost
behavior. Contribution margin covers fixed costs
and provides for income.

35. © The McGraw-Hill Companies, Inc., 2000Irwin/McGraw-Hill
The Contribution Format
Comparison of the Contribution Income Statement
with the Traditional Income Statement
Traditional Approach Contribution Approach
(costs organized by function) (costs organized by behavior)
Sales 100,000$ Sales 100,000$
Less cost of goods sold 70,000 Less variable expenses 60,000
Gross margin 30,000$ Contribution margin 40,000$
Less operating expenses 20,000 Less fixed expenses 30,000
Net income 10,000$ Net income 10,000$
Used primarily for
external reporting.
Used primarily by
management.

36. © The McGraw-Hill Companies, Inc., 2000Irwin/McGraw-Hill
End of Chapter 5

37. © The McGraw-Hill Companies, Inc., 2000Irwin/McGraw-Hill
Terimakasih,
see you again,
byeeee….!!!!!!

38. © The McGraw-Hill Companies, Inc., 2000Irwin/McGraw-Hill
CONTOH KASUS

39. © The McGraw-Hill Companies, Inc., 2000Irwin/McGraw-Hill
If sales salaries and commissions are $10,000
when 80,000 units are sold and $14,000 when
120,000 units are sold, what is the variable
portion of sales salaries and commission?
a. $0.08 per unit
b. $0.10 per unit
c. $0.12 per unit
d. $0.125 per unit
If sales salaries and commissions are $10,000
when 80,000 units are sold and $14,000 when
120,000 units are sold, what is the variable
portion of sales salaries and commission?
a. $0.08 per unit
b. $0.10 per unit
c. $0.12 per unit
d. $0.125 per unit
The High-Low Method

40. © The McGraw-Hill Companies, Inc., 2000Irwin/McGraw-Hill
If sales salaries and commissions are $10,000
when 80,000 units are sold and $14,000 when
120,000 units are sold, what is the variable
portion of sales salaries and commission?
a. $0.08 per unit
b. $0.10 per unit
c. $0.12 per unit
d. $0.125 per unit
If sales salaries and commissions are $10,000
when 80,000 units are sold and $14,000 when
120,000 units are sold, what is the variable
portion of sales salaries and commission?
a. $0.08 per unit
b. $0.10 per unit
c. $0.12 per unit
d. $0.125 per unit
The High-Low Method
$4,000 ÷ 40,000 units
= $0.10 per unit
Units Cost
High level 120,000 14,000$
Low level 80,000 10,000
Change 40,000 4,000$

41. © The McGraw-Hill Companies, Inc., 2000Irwin/McGraw-Hill
If sales salaries and commissions are $10,000
when 80,000 units are sold and $14,000 when
120,000 units are sold, what is the fixed portion
of sales salaries and commissions?
a. $ 2,000
b. $ 4,000
c. $10,000
d. $12,000
If sales salaries and commissions are $10,000
when 80,000 units are sold and $14,000 when
120,000 units are sold, what is the fixed portion
of sales salaries and commissions?
a. $ 2,000
b. $ 4,000
c. $10,000
d. $12,000
The High-Low Method

42. © The McGraw-Hill Companies, Inc., 2000Irwin/McGraw-Hill
If sales salaries and commissions are $10,000
when 80,000 units are sold and $14,000 when
120,000 units are sold, what is the fixed portion
of sales salaries and commissions?
a. $ 2,000
b. $ 4,000
c. $10,000
d. $12,000
If sales salaries and commissions are $10,000
when 80,000 units are sold and $14,000 when
120,000 units are sold, what is the fixed portion
of sales salaries and commissions?
a. $ 2,000
b. $ 4,000
c. $10,000
d. $12,000
The High-Low Method
Total cost = Total fixed cost +
Total variable cost
$14,000 = Total fixed cost +
($0.10 × 120,000 units)
Total fixed cost = $14,000 - $12,000
Total fixed cost = $2,000