John wishes to choose a combination of two types of cereals for breakfast - Cereal A and Cereal B. A small box (one serving) of Cereal A costs $0.55 and contains 10 units of vitamins, 5 units of minerals, and 15 calories. A small box (one serving) of Cereal B costs $0.40 and contains 5 units of vitamins, 10 units of minerals, and 15 calories. John wants to buy enough boxes to have at least 450 vitamins, 575 minerals, and 1050 calories. How many boxes of each food should he buy to minimize cost, and what is the minimum cost? To minimize his cost, John should buy boxes of Cereal A and boxes of Cereal B. The minimum cost would be