Hours of OperationMarginal Cost16212318424530636742
Krystal runs a nail salon and needs to decide how many hours to stay open. Table 2.2 illustrates her marginal costs of staying open for each additional hour. Suppose that we observe Krystal staying open 5 hours and her marginal benefit of staying open per hour is $18. If she is following the marginal principle, Krystal should:
A. stay open 2 more hours.
B. stay open 3 more hours.
C. stay open 2 fewer hours.
D. stay open 3 fewer hours.
Answer: C
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