An animal feed to be mixed from soybean meal and oats must contain at least 168 lb of protein, 27 lb of fat, and 14 lb of mineral ash. Each sack of soybeans costs $21 and contains 70 lb of protein, 9 lb of fat, and 7 lb of mineral ash. Each sack of oats costs $7 and contains 21 lb of protein, 7 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? Are the answers reasonable? How could they be interpreted? The minimum cost is $ (Round to the nearest cent.) Let x be the number of sacks of soybeans and let y be the number of sacks of oats. The amounts that satisfy the minimum requirements at minimum cost, are x = |andy = (Simplify your answers. Type integers or fractions.) Are the answers reasonable? How could they be interpreted? O A. The answers are not reasonable because it doesn't make sense to buy a fraction of a sack. The number of sacks of soybeans and oats should be rounded up to the nearest whole sack. B. The answers are reasonable and the animal feed should be made from the exact amounts of sacks of soybeans and oats that were found in the previous step. O C. The answers are not reasonable because it doesn't make sense to buy a fraction of a sack. The number of sacks of soybeans and oats should be rounded down to the nearest whole sack. O D. The answers are reasonable, but they do not correspond to the minimum cost