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
-Refer to Figure 9.3. If the firm maximizes its profit at 120 units of the output, calculate the firm's marginal revenue.

A) $35
B) $40
C) $55
D) $4,200
E) Cannot be determined from the information given.