There are 3 major costing methods:
Marginal costing
* Uses marginal cost of producing addition units
* Uses variable cost to derived a unit cost (does not include fixed cost)
* Fixed cost treated as a 'period cost' and deducted, as a total amount, from total contribution to profit for the period, in the firm's profit and loss account Absorption costing
* Calculates total cost of producing product
* In addition to variable cost, a fair proportion of fixed cost is allocated to (absorbed) eachunit of output, as a fixed cost per unit Activity based costing
* Similar to absorption costing but with fixed cost allocated to products on the basis of the cost of activities used in producing them LO 2, AC 2.1