The Figure Given Below Shows the Cost Curves of a Firm.Figure

Multiple Choice

The figure given below shows the cost curves of a firm.Figure 9.3
ATC: Average Total Cost
AVC: Average Variable Cost
MC: Marginal Cost
-In Figure 9.3, if the marginal revenue of the firm is constant at $55, calculate the profit earned by the firm at the profit-maximizing level of output?

A) $35
B) $40
C) $600
D) $4,800
E) $0