Respuesta :
Answer:
b) $25
Explanation:
Marginal cost is the added expense incurred by undertaking an extra activity, be it selling or production. The marginal concept is applied to determine the viability of engaging in extra activity. Marginal cost is a result of an extra unit of input. It can be additional labor hour, extra worker, or an extra unit produced.
In this case, the marginal cost will be $25. It the extra expense incurred to complete the costume. Marginal cost is the additional cost beyond the expected arising from an extra activity.