问题如下:
A machine manufacturer is analyzing its cost structure, and here presents the detailed information as following table shows: :
If the manufacturer increases the production units from 3 to 4, the marginal cost is equal to:
选项:
A.$35.
B.$70.
C.$85.
解释:
C is correct.
Marginal cost = change in total cost / change in quantity unit = $[(400+360)-(400+275)]/1=$85.
考点:边际成本
解析:第一步要先求总本即,它等于总固定成本+总可变成本,再套用公式可得
MC = ΔTC/ΔQ = $[(400+360)-(400+275)]/1=$85.
老师这题为什么不能用 (400+275 )/3 - (400+360)/4 =35 这样做?