Ruff, inc. makes dog food out of chicken and grain. chicken has 10 grams of protein and 5 grams of fat per ounce, and grain has 2 grams of protein and 2 grams of fat per ounce. a bag of dog food must contain at least 250 grams of protein and at least 150 grams of fat. if chicken costs 10¢ per ounce and grain costs 1¢ per ounce, how many ounces of each should ruff use in each bag of dog food to minimize cost? hint [see example 4.] (if an answer does not exist, enter dne.)