Aparking lot charges $2.50 for the first hour or part thereof , and $1.25 for each additional hour or part thereof. what is the greatest number of hours gwen parked if her total fee is $10

Suppose a store sells an average of 80 cases of soda per day. assume that each case contains 24 cans of soda and that the store is open 10 hours per day. find the average number of soda that the store sells per hour.