Direct costing:

Direct costing is the practice of charging all direct cost to operations,
processes or products, leaving all indirect costs to be written off against profits in the
period in which they arise. Under direct costing the stocks are valued at direct costs, i.e.,
costs whether fixed or variable which can be directly attributable to the cost units.
In general, the terms marginal costing and direct costing are used as synonymous.
However, direct costing differs from marginal costing in that some fixed costs considered
direct are charged to operations, processes or products, whereas in marginal costing only
variable costs are considered. Marginal costing is mainly concerned with providing of
information to management to assist in decision making and for exercising control.