Table 1-2 Thuy Anh Runs a Small Flower Shop in the Town

Multiple Choice

Table 1-2

Thuy Anh runs a small flower shop in the town of Florabunda. She is debating whether she should extend her hours of operation. Thuy Anh figures that her sales revenue will depend on the number of extra hours the flower shop is open as shown in the table above. She would have to hire a worker for those extra hours at a wage rate of $16 per hour.
-Refer to Table 1-2.What is Thuy Anh's marginal cost if she decides to stay open for an extra three hours instead of two hours?

A) $0
B) $16
C) $25
D) $32
E) $45