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Introduction to Cost behaviour and
Systems
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Cost and Cost Terminology
Costis a resource sacrificed or forgone to achieve
a specific objective.An actual costis the cost incurred (a historical cost)
as distinguished from budgeted costs.
A cost objectis anything for which a separatemeasurement of costs is desired.
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Cost and Cost Terminology
CostAccumulation
Cost Object
Cost Object
Cost Object
CostAssignment
Tracing
Allocating
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Direct and Indirect Costs
Direct Costs
Example: Paper on which
Times of I ndianewspaper
is printed
Indirect Costs
Example: Lease cost for
Times building
housing the senior journalists
of its newspaper
COST OBJECT
Example: Times ofIndia newspaper
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Direct and Indirect Costs
ExampleDirect Costs:
Maintenance Department 40,000
Personnel Department 20,600Assembly Department 75,000
Finishing Department 55,000
Assume that Maintenance Department costs areallocated equally among the production departments.
How much is allocated to each department?
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Direct and Indirect Costs
Example
Allocated20,000
Maintenance
40,000
Assembly
Direct Costs75,000
Finishing
Direct Costs55,000
20,000
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Cost Behavior Patterns Example
Bicycles by the Sea buys a handlebar
at 52 for each of its bicycles.What is the total handlebar cost when
1,000 bicycles are assembled?
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Cost Behavior Patterns Example
1,000 units 52 = 52,000
What is the total handlebar costwhen 3,500 bicycles are assembled?
3,500 units 52 = 182,000
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Cost Behavior Patterns Example
Bicycles by the Sea incurred 94,500 in
a given year for the leasing of its plant.This is an example of fixed costs with
respect to the number of bicycles assembled.
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Cost Behavior Patterns Example
What is the leasing (fixed) cost per bicycle
when Bicycles assembles 1,000 bicycles?94,500 1,000 = 94.50
What is the leasing (fixed) cost per bicycle
when Bicycles assembles 3,500 bicycles?
94,500 3,500 = 27
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Cost Drivers
The cost driver of variable costs is the level
of activity or volume whose change causesthe (variable) costs to change proportionately.
The number of bicycles assembled is a
cost driver of the cost of handlebars.
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Relevant Range Example
Assume that fixed (leasing) costs are 94,500
for a year and that they remain the same for acertain volume range (1,000 to 5,000 bicycles).
1,000 to 5,000 bicycles is the relevant range.
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Relevant Range Example
0
20000
40000
6000080000
100000
120000
0 1000 2000 3000 4000 5000 6000
Volume
FixedCo
sts
94,500
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Total Costs and Unit Costs
Example
What is the unit cost (leasing and handlebars)
when Bicycles assembles 1,000 bicycles?Total fixed cost 94,500
+ Total variable cost 52,000 = 146,500
146,500 1,000 = 146.50
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Total Costs and Unit Costs
Example
0
50000
100000
150000
200000
0 500 1000 1500
Volume
TotalCosts
94,500
146,500
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Use Unit Costs Cautiously
Assume that Bicycles management uses a
unit cost of 146.50 (leasing and wheels).
Management is budgeting costs for
different levels of production.
What is their budgeted cost for anestimated production of 600 bicycles?
600 146.50 = 87,900
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Use Unit Costs Cautiously
What is their budgeted cost for an estimated
production of 3,500 bicycles?
3,500 146.50 = 512,750
What should the budgeted cost be for an
estimated production of 600 bicycles?
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Use Unit Costs Cautiously
Total fixed cost 94,500
Total variable cost (52 600) 31,200
Total 125,700
125,700 600 = 209.50
Using a cost of 146.50 per unit wouldunderestimate actual total costs if output
is below 1,000 units.
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Use Unit Costs Cautiously
What should the budgeted cost be for an
estimated production of 3,500 bicycles?
Total fixed cost 94,500
Total variable cost (52 3,500) 182,000
Total 276,500
276,500 3,500 = 79.00
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Manufacturing
Manufacturing companies
purchase materials and components and
convert them into finished goods.
A manufacturing company must also develop,
design, market, and distribute its products.
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Merchandising
Merchandising companies
purchase and then sell tangible products
without changing their basic form.
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Merchandising
Service companies
provide services or intangible
products to their customers.
Labor is the most significant cost category.
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Types of Inventory
Manufacturing-sector companies
typically have one or more of the
following three types of inventories:
1. Direct materials inventory
2. Work in process inventory (workin progress)
3. Finished goods inventory
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Types of Inventory
Merchandising-sector companies hold
only one type of inventorythe
product in its original purchased form.
Service-sector companies do not
hold inventories of tangible products.
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Classification of
Manufacturing Costs
Direct materials costs
Direct manufacturing labor costs
Indirect manufacturing costs
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Inventoriable Costs
Inventoriable costs (assets)
become cost of goods sold
after a sale takes place.
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Period Costs
Period costs are all costs in the income
statement other than cost of goods sold.Period costs are recorded as expenses of the
accounting period in which they are incurred.
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Flow of Costs Example
Bicycles by the Sea had 50,000 of direct
materials inventory at the beginning of the period.Purchases during the period amounted to
180,000 and ending inventory was 30,000.
How much direct materials were used?
50,000 + 180,00030,000 = 200,000
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Flow of Costs Example
Direct labor costs incurred were 105,500.
Indirect manufacturing costs were 194,500.What are the total manufacturing costs incurred?
Direct materials used 200,000
Direct labor 105,500Indirect manufacturing costs 194,500
Total manufacturing costs 500,000
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Flow of Costs Example
Assume that the work in process inventory
at the beginning of the period was 30,000,
and 35,000 at the end of the period.What is the cost of goods manufactured?
Beginning work in process 30,000
Total manufacturing costs 500,000Ending work in process 35,000
Cost of goods manufactured 495,000
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Flow of Costs Example
Assume that the finished goods inventory
at the beginning of the period was 10,000,
and 15,000 at the end of the period.What is the cost of goods sold?
Beginning finished goods 10,000
Cost of goods manufactured 495,000Ending finished goods 15,000
Cost of goods sold 490,000
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Flow of Costs Example
Work in Process
Beg. Balance 30,000 495,000Direct mtls. used 200,000
Direct labor 105,500
Indirect mfg. costs 194,500
Ending Balance 35,000
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Flow of Costs Example
Work in Process
495,000
Finished Goods
10,000 490,000
495,000
15,000
Cost of Goods Sold
490,000
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Manufacturing Company
MaterialsInventory
FinishedGoods
Inventory
Revenues
Cost ofGoods Sold
INCOME STATEMENT
PeriodCosts
InventoriableCosts
BALANCE SHEET
Equals Operating Income
whensalesoccur
deduct
Equals Gross Margin
deductWork inProcess
Inventory
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Merchandising Company
INCOME STATEMENTBALANCE SHEET
whensalesoccur
InventoriableCosts
MerchandisePurchases
Inventory
Revenues
deduct
Cost ofGoods Sold
Equals Gross Margin
deduct
PeriodCosts
Equals Operating Income
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Prime Costs
Direct
Materials
Direct
Labor
Prime
Costs+ =
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Prime Costs
What are the prime costs for Bicycles by the Sea?
Direct materials used 200,000+ Direct labor 105,500
= 305,000
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Conversion Costs
Direct
Labor
Manufacturing
Overhead+ =Conversion
Costs
I ndir ect
Labor
I ndirect
Mater ials Other
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Measuring Costs
Requires Judgment
Manufacturing labor-cost classifications
vary among companies.The following distinctions are generally found:
Direct manufacturing labor
Manufacturing overhead
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Measuring Costs
Requires Judgment
Manufacturing overhead
Indirect labor Managers salaries Payroll fringe costs
Forklift truck operators (internal handling of materials)
Janitors Rework labor
Overtime premium Idle time
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Measuring Costs
Requires Judgment
Overtime premium is usually
considered part of overhead.Assume that a worker gets 18/hour
for straight time and gets
time and one-half for overtime.
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Measuring Costs
Requires Judgment
How much is the overtime premium?
18 50% = 9 per overtime hourIf this worker works 44 hours on a given
week, how much are his gross earnings?
Direct labor 44 hours 18 = 792Overtime premium 4 hours 9 = 36
Total gross earnings 828
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Many Meanings of Product Cost
A product cost is the sum of the costs
assigned to a product for a specific purpose.
1. Pricing and product emphasis decisions
2. Contracting with government agencies
3. Preparing financial statements for externalreporting under generally accepted
accounting principles
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