Answer:
B) change in average total costs divided by the change in output.
Explanation:
Marginal cost is the extra cost incurred for the production of an additional unit of output after breakeven. At the breakeven point, fixed costs have been absorbed. Any additional production will incur variable costs . Marginal costs will, therefore, comprise direct labor, direct material, and a small proportion of fixed costs, such as administration and selling costs.
The calculate marginal cost, divide the total change in costs by the change in the product output. i.e.
Marginal costs = change in cost / change in output.
Marginal cost is compared with marginal revenue when deciding whether to increase production or not.
