NO.PZ2023010401000025
问题如下：
Consider the following data for a firm operating in perfect competition.
The profit-maximizing output is
选项：
A.21
B.23.
C.in excess of 24.
解释：
Under perfect competition, economic profits are maximized where marginal revenue equals marginal cost; in this case where marginal cost crosses $10 per unit. Profits are maximized at 23 units of production.
中文解析：
在完全竞争条件下，边际收益等于边际成本时，经济利润最大化;在这种情况下，边际成本超过10美元/单位。利润在生产23个单位时达到最大化。
23的时候marginal cost不是9么，marginal revenue是10不相等啊
