Sara has two puppies, Sonny & Cher. Every month she purchases enough food to feed her puppies for the month. Sonny eats 8.25 cans of food per week. Cher eats 15 1/2 cans of food per week. Sara purchases a 40 can variety pack of Cute Puppy food that costs $21.
2. Calculate the cost of a one-month supply of Cute Puppy for Sonny & Cher.