Hello,
- Direct costing deals only with Direct expenses like Labour, Material, Direct expenditure etc.,
Most of the time Direct costs are variable and Indirect costs are fixed.
Hence, Fixed Overhead do not form part of Direct Costing.
- Variable costing again deals only with variable costs i.e., Direct Material, Labour, expenditure costs.
Hence the same as above can be applied here. Fixed Overhead is Fixed and Direct and Variable Costing deal only with Variable costs.
- Also, Variable and Direct costing are applied only for normal production. Hence, they vary with the level of production and hence are variable and they ignore the fact that Indirect or Fixed costs also contribute to the production.
But, Marginal costing deals with cost incurred in producing an additional unit and hence should actually consider both variable and fixed costs for that additional unit but this theory only assumes that Fixed costs do not contribute to producing an additional unit as they do not vary with the level of production.
Direct and Variable costing ignore Fixed costs.
Marginal costing only assumes it's not applicable. So, d) option is the right.
All the best with your exams.
Regards,
Subhash.