The Below Figure Shows the Various Combinations of the Goods

The below figure shows the various combinations of the goods X and Y that yield different levels of utility.Figure 7.3

-Assume that one laborer produces 6 units of output, two laborers produce 14 units, three produce 20 units, and four produce 24 units. If the cost is $20 per unit of labor and fixed costs are $100, what is the average total cost of producing 14 units of output?

A) $50
B) $20
C) $10
D) $100
E) $40