4. Refer to Figure 1. Using the midpoint method, between prices of $30 and $36, price elasticity of demand is about a. 0.S. b. 0.82. C. 1.22. d. 2. 5. Refer to Figure 1 . The maximum value of total revenue corresponds to a price of a. $18. b. $30. C. $42. d. $48. 6. Refer to Figure 1 . At a price of $48 per unit, sellers' total revenue equals a. $150. b. $200. C. $288. d. $364