A firm has a variable cost of $100 at 5 units of output. If fixed costs are $40, what will be the average total cost at 5 units

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问题 A firm has a variable cost of $100 at 5 units of output. If fixed costs are $40, what will be the average total cost at 5 units of output?

选项 A、$140
B、$60
C、28
D、12

答案C

解析 答案为C项。本题中厂一商5个单位产量平均固定成本为$40/5=$8,平均可变成本为$100/5=$20,因此,平均总成本为$8+$20=$28。故本题选C项。
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