Roach Motors Is the Dominant Used-Car Dealer in a Small

Roach Motors is the dominant used-car dealer in a small Midwestern city. After paying $50,000 for overhead, Roach Motors' cost per car is $500. There are 5 other small used-car lots in this town, but since they are not large enough to purchase cars through the same discount sources as Roach, each firm faces the cost function C = 5,000 + 700Q + 5Q². The demand for used cars is Q = 200 - . Assuming Roach is aware of its competitors' costs, what price should Roach set for a used car?

A) $708.33
B) $575
C) $616.67
D) $604.17
E) $925