Quantity Variable Cost Fixed Cost Total Cost Average Variable Cost ($ per unit) Marginal Costs ($ per unit) 0 40 40 O O 5 40 B 5 E 2 15 40 C D F 3 A 40 60 $6.67 G O A= 20; C = 25; D = 7.50; E = 45 O A = 25; C = 25; D = 5; E = 45 O A = 25; C = 55; D = 5; E = 5 O A = 20; C = 55; D = 7.50; E = 5