问题如下：
Assuming there is no fixed costs, which of the following would most likely leading to higher gross profit margin?
选项：
A.Increasing the number of goods sold.
B.Decreasing the cost of producing each good.
C.Decreasing the costs of administration.
解释：
B is correct.
Decreasing the cost of producing each good would lower the cost of units sold, thus leading to higher pross profit.
Because there is no fixed cost, increasing the number of goods sold will result in no change in gross profit margin.
Gross profit margin contains no administrative expenses.
这道题不应该是C么？Gross Profit里面没有G&A啊？那Cost of Administrator不就是G&A这种么，应没有影响啊~~~
