1a) Seafood Salt Company wishes to third degree price discriminate between retail grocers (group A) and commercial users such as bakeries (Group B). The firm's total cost schedule is TC = $5*QA + $20*QB. Demands for retail grocers and commercial users are, respectively, QA = 4,000*PA^-3.0 and QB = 100,000*PB^-2. The profit-maximizing prices to charge Groups A and B are

1b) Seafood Salt Company wishes to third degree price discriminate to meet competition in two markets A and B. The firm's total cost schedule is TC = 300 + $2*QA + $2*QB. Demands in the two markets are QA = 120-10*PA and QB = 120 - 20*PB. The profit-maximizing prices to charge in markets A and B are PA = _____ and PB =