Revenue and costs $34 ATC 29.50 _ 21 . 13 L 0 600 800 940 116 Quantity Figure 15-4 shows the demand and cost curves for a monopolist. Refer to Figure 15- 4. What is the amount of the monopoly's total cost of production? 0 $7,800 0 $17,700 9 0 $21,600 0 $9,340