Figure 15-18 Price 70 60- 50 - 35 30 25 20 10 MC=ATC MR Demand 50 100 150 200 250 300 350 400 450 500 550 600 650 Quantity Refer to Figure 15-18. If there are no fixed costs of production, monopoly profit with perfect price discrimination equals O $O. O $1,000. O $2,000. O $4,000