an animal feed to be mixed from soybean mean and oats must contain at least 120lb of protein, 27 lb of fat, and 10 lb of mineral ash. each sack of soybeans costs $15 and contains 50 lb of protein, 9lb of fat, and 5lb of mineral ash. Each sack of oats costs $5 and contains 15 lb of protein, 5lb of fat, and 1 lb of mineral ash. How many sacks of each should be used to satisfy the minimum requirements at minimum cost?
