Q. A diet is being prepared for University of Arizona dorms. Objective is to feed students at least cost, but diet must have between 1,800 also 3,600 calories. No more than 1,400 calories can be starch; also no fewer than 400 can be protein. Varied diet is to be made of two foods: A also B. Food A costs $0.75 per pound also contains 600 calories, 400 of which are protein also 200 starches. No more than two pounds of food A can be used per resident. Foods B costs $0.15 per pound also contains 900 calories, of which 700 are starch, 100 are protein, also 100 are fat.