The graph shows a firm's marginal cost curve. This firm operates in a perfectly competitive industry with market demand and supply curves given by Qd = 100-8 P and QS=-20+2 P. where Q is measured in millions of units. Based on the figure, how many units of output will the firm produce at the equilibrium price? OA. 400 B. 1,100 OC. 800 OD. 1,200 Price (S) 24 21- 852 12 9 3- -21 fo 10 MG 8 10 12 14 16 18 20 Quantity (100s).