选择题：37.You’d better add them up. I’m not good at ____.

题目内容：

37.
You’d better add them up. I’m not good at ____.　
(A) figures
(B) characters
(C) summaries
(D) counters

参考答案：

9.某公司生产某种产品的固定成本是30万元，除去固定成本外，该产品每单位成本为4元，市场售价为10元

9.某公司生产某种产品的固定成本是30万元，除去固定成本外，该产品每单位成本为4元，市场售价为10元，若要达到6万元销售毛利的目标，该产品销量应为多少？ (

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