There are supposed to be biscuits in a frozen package, but there could be as many as 2
extra or 2 fewer in each bag, depending on the weight of the biscuits. solving the equality will give
the highest and lowest amounts of biscuits in the bag.

Your vet has placed your pet on a diet. the diet is to contain at least 12 mg of fat and at least 14 mg of protein per serving. these requirements are to be obtained from two food sources. source a contains 2 mg of fat and 2 mg of protein per serving. source b contains 1 mg of fat and 3 mg of protein per serving. if source a sells for $1.28 per serving and source b sells for $1.12 per serving, how many servings of each type should be purchased to satisfy the requirements at minimal cost?