Figure 71 Shows the U-Shaped Cost Curves for a Producer

Figure 7.1 shows the U-shaped cost curves for a producer. In the figure below, A is the marginal cost curve, B is the average variable cost curve, and C is the average total cost curve. When output is 10, then:​ ​
Figure 7.1
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A) total cost equals $80.
B) fixed cost equals $10.
C) variable cost equals $70.
D) marginal cost equals $10.
E) fixed cost equals $7.