By eating 1 egg, 1 cupcake, and 1 slice of pizza, a child consumes 303 mg of cholesterol. If the child eats 3 cupcakes and 4 slices of pizza, he or she takes in 89 mg of cholesterol. By eating 2 eggs and 1 cupcake, a child consumes 571 mg of cholesterol. How much cholesterol is in each item?
