DeShawn's Detailing is a service that details cars at the customers' homes or places of work.DeShawn's cost for a basic detailing package is $40, and he charges $75 for this service.For a total price of $90, DeShawn will also detail the car's engine, a service that adds an additional $20 to the total cost of the package.What is the marginal cost of adding the engine detailing to the basic detailing package?
A)$20
B)$30
C)$60
D)$60 plus the value of his time

Question

Quizplus · Accepted Answer

The marginal cost of adding the engine detailing is the additional cost incurred, which is $20.

DeShawn's Detailing Is a Service That Details Cars at the Customers