Question

A small organic food store makes two types of fruit smoothies: tropical and sport. Each tropical smoothie uses 9 oz of orange juice and 6 oz of milk. Each sport smoothie uses 3 oz of orange juice and 3 oz of milk. The store stores the orange juice in a 210-oz container and milk in an 150-oz container. The store sells the tropical smoothies for $4 and sells the sport smoothie for $3. What is the maximum in sales the store can make from 1 container each of orange juice and milk?