An animal feed to be mixed from soybean meal and oats must contain at least 120120 lb of protein, 2727 lb of fat, and 1010 lb of mineral ash. Each sack of soybeans costs $ 15$15 and contains 5050 lb of protein, 99 lb of fat, and 55 lb of mineral ash. Each sack of oats costs $55 and contains 1515 lb of protein, 55 lb of fat, and 1 lb of mineral ash. How many sacks of each should be used to satisfy the minimum requirements at minimum cost?
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Part 1
What is the minimum cost?
