Use the information provided to answer Part A and Part B of the question.

Jenifer is making a fruit salad for the family picnic. She follows a recipe that mixes one part pineapple with two parts grapes and three parts cherries. Pineapple costs $2 per pound, grapes cost $3 per pound, and cherries cost $4 per pound.

Part B
Jenifer's sister gave her a different recipe which calls for her to mix seven parts pineapple, four parts grapes, and one part cherries. If Jenifer follows her sister's recipe, how many pounds of fruit salad can she make for $60?