For the following three cases, calculate The marginal revenue curve The level of output where MR = MC (i. e., set the equation from item i equal to marginal cost and solve for Q) The profit-maximizing price (i. e., plug your answer from equation ii into the demand curve) Total revenue and total cost at this level of output (something you learned in Chapter 11) What entrepreneurs really care about—total profit Case A: Demand: P = 50 – Q Fixed cost = 100 Marginal cost =10 Case B: Demand: P = 100 – 2Q Fixed cost = 100 Marginal cost =10 Case C: Demand: P = 100 – 2Q Fixed cost = 100 Marginal cost =20