Computers per day Fixed cost Variable cost Total cost Marginal cost ATC AVC 0 30 AFC Price 0 30 30 20 35 50 20 50 20 30 30 30 35 60 10 3 30 15 30 15 40 35 70 10 23.33 13.33 30 10 60 35 90 UI A 20 22.5 15 30 7.5 90 35 120 30 24 18 30 6 130 160 35 40 26.67 21.67 30 5 180 35 LD CO O 210 50 30 25.71 30 4.29 240 35 270 60 33.75 30 30 3.75 310 35 340 70 10 37.78 34.44 30 3.33 390 420 35 80 42 39 3 35