These graphs depict the price and output levels of apples under perfect competition and monopoly market structures. What is the extra amount that Mary would pay for apples under a monopoly instead of a perfect competition? Two line graphs between pounds of apples and price represent perfect competition and monopoly. The first graph shows a U-shaped curve and then ascends upward as a straight line. The second shows two intersecting lines and a third touching line. A. $2 B. $3 C. $4 D. $5 E. $6