| 1. | If the plane has empty seats , the cost of adding one more passenger is minuscule , although the average cost of flying a passenger is 500 , the marginal cost is merely the cost of the bag of peanuts and can of soda that the extra passenger will consume
如果飞机有空的座位,每增加一个乘客成本就会更小,尽管每位飞行乘客的平均成本是500美元,边缘的价格仅仅是乘客将额外消费的花生和罐装汽水的价格 |
