I have to take care of my sister's cat while she is on vacation. The cat is a very picky eater and will only eat a certain cat food, available at two stores.
Gristede's sells 12 cans for $18
PetSmart sells 20 cans for $26
Which store is offering the best deal on cat food?
Make sure to explain how you were able to determine which store offers the best deal on the cat food.
