A Firm Can Produce 100 Units Per Week $C = 600 + 1200 x$

Multiple Choice

A firm can produce 100 units per week. If its total cost function is $C = 600 + 1200 x$ dollars, and its total revenue function is $R = 1300 x - x ^ { 2 }$ dollars, how many units x should it produce to maximize its profit?

A) 1250 units
B) 650 units
C) 93 units
D) 50 units
E) 100 units