Math for Grocery Store Shopping, Lesson Plan, Food, Teaching Worksheet ... Lesson: At a grocery store, the produce department often sells fruit and vegetables at a price per pound or a price per item. For example, bananas may cost $0.44 per pound or tomatoes may cost $0.89 each. In order to determine the cost of the amount of each item you would need, you must figure the price per pound or per item and then multiply ...