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Unit 6: Marginal Costing and Absorption Costing
Indirect Material – cost of fuel, oil and so on Notes
Indirect Labour: Wages paid to workers for maintenance of the fi rm.
From the Table 6.1 the marginal cost is equivalent to the variable cost per unit of the various levels
of production. The fixed cost of ` 500 is the cost remains the same at not only irrespective levels
of production but also already absorbed at the initial level of production. The initial absorption
of fixed overhead led the marginal cost to become as variable cost.
Semi-variable cost: Another major classification is semi variable/fixed cost which is a cost
partly fixed/variable to the certain level of production or consumption, e.g., Electricity charges,
telephone charges and so on.
It jointly discards the importance of the fixed cost and the semi- variable cost for analysis while
ascertaining the marginal cost.
Marginal Costing is defined as “the ascertainment of marginal cost and of the effect on profi t of
changes in volume or type of output by differentiating between fixed and variable costs.”
In marginal costing, the change in the level of cost of operation is equivalent to variable cost due
to fixed cost component which is fixed irrespective level of outputs.
Self Assessment
Fill in the blanks:
1. ...................... is the cost nothing but a change occurred in the total cost due to changes taken
place on the level of production.
2. The ...................... is the cost involved in the procurement of indirect materials, indirect
labour and indirect expenses.
3. The initial absorption of ...................... led the marginal cost to become as variable cost.
6.2 Contribution
The costs are classified into two categories viz. fixed and variable cost. Variable cost per unit is
considered as marginal cost of the product. Fixed costs are charged against contribution of the
transaction. Selling price of the product = marginal cost + contribution.
Figure 6.3
Contribution
Method of Difference Method of Meeting
Sales - Variable Cost Fixed cost + Profit
Marginal costing profitability statement as follows:
Sales xxxx
Variable Cost xxxx
Contribution xxxx
Fixed Cost xxxx
Profi t xxxx
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