Table 13-8 quantity of output fixed cost variable cost 0 $20 $0 1 $20 $10 2 $20 $40 3 $20 $80 4 $20 $130 5 $20 $200 6 $20 $300 refer to table 13-8. what is the average fixed cost of producing 5 units of output?
a. $44
b. $5
c. $4
d. $40