D Question 13 5.88 pts Number of Fixed Variable Total Workers Output Cost Cost Cost 0 $50 $0 $50 90 $50 $20 $70 170 $40 230 $50 $60 $110 240 $50 $80 $130 What is the average fixed cost (i.e. the fixed cost per unit) when making 90 units? O AFC = FC/Q = $50/90 = $0.56 per unit O AFC = FC/Q = $50/1 = $50 per unit. O None of the above