Monopoly: End of Chapter Problem Consider this situation for a monopolist. . Demand: P = 50 - Q . Fixed cost = 100 . Marginal cost = 10 a. Use the information to calculate the variables indicated. i. The marginal revenue curve: MR = ii. The level of output where MR = MC: Q* = iii. The profit-maximizing price: P* = $ iv. Total revenue at Q*: TR = $