NO.PZ2017100901000010
问题如下：
A company has total variable costs of $4 million and fixed costs of $3 million. Based on this information, the company will stay in the market in the long term if total revenue is at least:
选项：
A.$3.0 million.
B.$4.5 million.
C.$7.0 million.
解释：
C is correct.
A company will stay in the market in the long term if total revenue is equal to or greater than total cost. Because total costs are $7 million ($4 million variable costs and $3 million fixed costs), the company will stay in the market in the long term if total revenue equals at least $7 million.
考点：厂商长期生存条件
解析：厂商在想要在长期留存下来，其收益必须等于或者超过其总成本
总成本=总固定成本+总可变成本=3+4=7M
RT
