Question 37 0.90 0.85 0.80 Marginal Cost 0.75 0.70 0.65 D.60 0.55 1.50 1.00 0.50 300 350 400 150 250 50 100 200 0.90 0.85 0.80 0.75 0.70 0.65 0.60 Demand 0.55 0 50 0 45 0 40 8000 7250 6500 6000 5250 4500 9500 8750 Suppose that the graphs above represent the cost curves for firms in a competitive industry and the overall market demand. Initially there are 60 firms in the industry. What is the per-firm profit at the short-run equilibrium price? da. S-10 O b. So O c. $20 O d. $30