0. zu units per day 45. The above figure shows the demand and cost curves for a single-price monopolist. The profit the firm will earn when producing the profit maximizing level of output is a. $0 b. $10 C. $20 d. $30 46. When customers' willingness and ability to purchase a product is identifiable and there is no resale market, the firm can engage in a. strategic marketing b. price discrimination c. cost engineering d. mortal combat