試題詳解

9. Suppose when a monopolist produces 75 units its average revenue is $10 per unit, its marginal revenue is $5 per unit, its marginal cost is $6 per unit, and its average total cost is $5 per unit. What can we conclude about this monopolist?
(A) The monopolist is currently maximizing profits, and its total profits are $375.
(B)The monopolist is currently maximizing profits, and its total profits are $300.
(C)The monopolist is not currently maximizing profits； it should produce more units and charge a lower price to maximize profits.
(D)The monopolist is not currently maximizing profits； it should produce fewer units and charge a higher price to maximize profits.