Mrs. Roberts has a favorite recipe for 1 batch of snack mix. The recipe is :
2 1/2 cups pretzels
2 1/2 cups dry cereal
2 1/4 peanuts
3/4 cup raisins

Part A : She estimates that each serving is 1/2 cups of snack mix. How many batches of snack mix will she need in order to make 200 servings? Show and explain all of your steps.

Part B :
How much of each ingredient will Mrs. Roberts need to make 200 servings? Show and explain all of your steps.