A company that produces fish sticks, has three plants and four customers. The three plants will produce 30K, 50K, and 50K cases of fish sticks, respectively, during the next year. Tardis Inc. has made a commitment to sell 40K cases to Pond & Williams, 30K cases to Riversong Stores, and at least 30K cases to Centurion Market. Both Centurion Market and Stone Angel Shop also want to buy as many of the remaining units as possible. The profit associated with shipping 1000 cases from each plant to each customer is given in the table. How can Tardis Inc. maximize profit?