### Using the simplex method in mathematics

Mark, who is ill, takes vitamin pills. Each day he must have at least 16 units of vitamin A, 5 units of vitamin B1, and 20 units of vitamin C. He can choose between pill 1, which costs 10¢ and contains 8 units of A, 1 of B1, and 2 of C; and pill 2, which costs 20¢ and contains 2 units of A, 1 of and 7 of C. How many of each pi