ACOF 014
Introduction to Costing
Semester 2 2008/ 2009
T
OPIC7: A
BSORPTION ANDM
ARGINALC
OSTINGOutline:
1. Learning Objectives
2. Differences between absorption and variable costing 3. Impact on profit under each costing technique 1. Learning objectives
a. Explaining the differences between absorption costing and marginal costing b. Explaining the impact on stock valuation & profit under each costing
system
c. Explaining the impact on under each costing system
d. Preparing multi-period absorption and marginal costing profit statements 2. Explaining the differences between absorption costing and Marginal
costing 298)
Flow of Costs under Full Absorption & Marginal Costing FULL ABSORPTION COSTING
PERIOD COST PRODUCT COSTS
Selling and administrative expenses Fixed manufacturin g overhead Variable manufacturing overhead Direct materials and direct labour Work in process inventory Expenses for the period Cost of goods sold Closing inventories MARGINAL COSTING
PERIOD COST PRODUCT COSTS
Selling and
expenses g overhead overhead direct labour Work in process inventory Expenses for the period Cost of goods sold Closing inventories Absorption Costing = full costing
- DM + DL + Marginal + fixed manufacturing OH product cost - Non-manufacturing cost period cost
Marginal Costing (Variable/ Direct Costing)
DM + DL + Marginal manufacturing OH product cost
Fixed manufacturing OH + non-manufacturing cost period cost Which method should be used?
External reporting use absorption Costing Match costs against revenues.
** absorption costing may have under/over recovery of fixed overheads charged to I/S as period costs (refer Topic #4 on OH) Internal reporting debatable both useful in different ways
The Concept of Contribution Margin MARGINAL
COST =
VARIABLE
COST = DIRECT LABOUR + DIRECT MATERIAL + DIRECT EXPENSE + VARIABLE OVERHEADS
CONTRIBUTION MARGIN = SALES – MARGINAL COST
the contribution margin (CM) is the excess of sales revenues over varibale costs in other words, CM is the amount available to cover the fixed costs, once they are
covered, any remaining amounts adds directly to the income form the operations. CM could also be expressed in total or per unit of product.
Illustration 1: Contribution Margin Income Statement
Sales RM 1,000,000
CM RM 400,000 Available to cover the FC of RM300,000.
Fixed costs 300,00
Income from operations RM 100,000
(note: think of the fixed costs as a bucket and the CM is water filling the bucket. Once the bucket is filled, the overflow represents income from operations. Up until the point of overflow, however, the CM contributes to fixed costs (filling the bucket)).
3. Preparing multi-period absorption and marginal costing profit statements
Illustration 2:
The unit cost of production for a firm which produces a single product is: Direct materials 2.60
Direct labour 3.00 Variable overhead 0.40 Fixed overhead 1.00
7.00
The fixed overhead calculation is based on a budgeted level of activity of 150,000 units and budgeted manufacturing fixed overheads f RM150,000 for each quarter. The budgeted selling and administration overheads are RM100,000 per quarter (all fixed). The selling price for the product is RM10 per unit. The production and sales for each quarter were:
Quarter 1 Quarter 2 Quarter 3 Quarter 4 Production (units) 150,000 170,000 140,000 150,000
Sales (units) 150,000 140,000 160,000 160,000
There was no opening stock in Quarter 1 and you should assume that actual costs were identical to estimated costs.
You are required to:
a) produce in columnar format, absorption and variable costing profit statements
b) comment on the results for each quarter and the year as a whole
Illustration 3:
Assume, for example, that on June 1, Hamilton Manufacturing Company opened a new plant in Nashville. Data for the plant's first month of operations are as follows:
Units manufactured and units sold:
Number of units manufactured (all completed by June
30) 11,000
Number of units sold 101,000
Units in inventory of finished goods at June 30 1,000 Sales revenue and selling and administrative expenses:
Net sales (10,000 units sold @ $20) RM 200,000 Selling and administrative expenses:
Variable (RM2 per unit sold) RM 20,000
Fixed RM 30,000
Required:
(a) Prepare manufacturing costs (per unit manufactured) statement under both costing systems
(b) Prepare partial income statement under both costing systems
4. Explaining the impact on stock valuation & profit under each costing system
Impact on Profit:
Production = sales Absorption costing π = Marginal costing π
(i.e. stocks value do not ↑ or ↓, ( same amount of FOH included as expense and as closing stock)
Production > sales Absorption costing π > Marginal costing π (i.e. when there are units produced that become closing stock) AC: closing stock ↑ as FOH included higher closing stock ↑π VC: closing stock ↓ as FOH NOT included
Production < sales Absorption costing π < Marginal costing π (i.e. when part of the units sold covered by opening stock)
AC: closing stock ↓ because less FOH charged to production ↓ closing stock ↓π
Problems: under Absorption Costing
profit decrease even though sales up and SP and cost structure unchanged
INCOME STATEMENT FORMATS
Marginal Costing/Marginal Costing/Direct Costing the CVP format:
<company name> Income Statement
for the <period> ended xx/xx/xxxx
_____________________________________________________________________________________________
Sales ………... xxxxx
Marginal expenses: Beginning inventory ………...xxx
Marginal manufacturing costs ………...xxx
Cost of goods available for sale ………... xxx
Closing inventory ………...(xxx)
Marginal cost of goods sold ………...xxx
Marginal selling and administrative expenses ………. xxx
Total Marginal expenses ………... (xxxx)
Contribution margin ………... xxxxx
Fixed expenses: Manufacturing overhead ………...xxx
Selling and administrative ………...xxx
Total fixed expenses ………. ... (xxxx)
Net Profit (Loss) from operations ………... xxxx
Absorption Costing/Full Costing <company name> Income Statement for the <period> ended xx/xx/xxxx Sales ………... xxxxx
Less: Cost of Goods Sold: Beginning inventory ………... xxx
Total production cost ………...xxx
Cost of goods available for sale ………...xxx
Closing inventory ………...(xxx)
Cost of goods sold ………... (xxxx)
Adjustments for (Under)/Over recovery of overheads ……….. (xxxx)
Gross Profit ………... xxxxx
Non-manufacturing overheads/expenses ………... (xxxx)
Example Questions:
1.
Zeera Limited manufactures a single product, the budgeted selling price and Marginal cost details of which are as follows:RM Selling price 15.00 Marginal costs per unit:
Direct materials 3.50 Direct labour 4.00 Marginal overhead 2.00
Budgeted fixed overhead costs are RM60,000 per annum, charged at a constant rate each month. Budgeted production is 30,000 units per annum.
In a month when actual production is 2,400 units and exceeded sales by 180 units the profit reported under absorption costing was:
a. RM6,660 b. RM7,570 c. RM7,770 d. RM8,200 e. RM8,400
2.
A company made 10,000 units at a total cost of RM20 each. Three-quarters of the costs were Marginal and one-quarter fixed. 8,000 units were sold at RM30 each. There were no opening stocks. Calculate the profits under both the absorption and marginal costing system.1. NyumNyum Ltd. starts business on 1 July, making product Roro. The standard cost for Roro is as follows:
RM
Direct labour 5
Direct material 8
Variable production overhead 2 Fixed production overhead 5 Total standard production cost
20
The fixed production overhead figure has been calculated on the basis of a budgeted normal output of 36,000 units per annum.
You are to assume that all budgeted fixed expenses are incurred evenly over the year.
Selling, distribution and administration expenses are: Fixed RM120,000 per annum
Variable 15% of the sales value
The selling price per unit is RM35 and the number of units produced and sold was: July August
(units) (units)
Production 2,000 3,200
Sales 1,500 3,000
Required:
Prepare profit statements for each of the months of July and August using: a) marginal costing
b) absorption costing
2. The data below relate to Buat Taktau Company which makes and sells one product. There was no stock at the beginning of August. August September Units Units Sales 4,000 6,000 Production 8,000 2,000 RM RM
Selling price per unit 80 80
Variable production costs per unit 40 40
Fixed production overhead incurred 96,000 96,000 Fixed production overhead cost per unit, being the
predetermined overhead absorption rate 12 12
Fixed selling, distribution and administration costs 40,000 40,000
Required:
a) Prepare comparative profit statements for each month using:
(i) Absorption costing; (ii) Marginal costing. 1. Give two examples where marginal costing is used.
3. A company, “Macam-Macam Ada” Enterprise which located in Taman Setiawangsa, manufactures and sells supplement product, “E-Nergy”. The company provides the standard production costs of which is as follows for one unit of
RM
Direct Materials (4 kg x RM5/kg) 20 Direct Labour (2 hours x r5/hr) 10 Variable production overhead 8
Selling Price 60
Fixed production overhead for the company is RM32,000, which is constant throughout the year. The company has normal capacity of production units at 16,000 units per annum.
Other expenditures which relating to selling and distribution are as Variable : 10% of Sales Values
Fixed : RM18,000 per annum
Since this is the first year of company’s operations of its business, therefore there is no opening stock for the year 2006.
2006 2007
Sales (units) 7,000 8,500
Production (units) 9,000 11,000
Rquired:
a) Prepare profit statement using Marginal Costing for BOTH years. b) Prepare profit statement using Absorption Costing for BOTH years.
4. Textbook Drury: Question 8.16 (page 234-235).
