Jack's Convenience Store is open for 20 hours a day, Monday through Saturday. There is always one employee in the store. The store employs three full- time employees , who work 40 hours per week and earn $9 per hour. The store also spends $ 200 per week on each full- time employee's benefits. Their labor contract requires that they earn double- time for any overtime work and that any employee who works 30 hours or more per week be given full benefits . The store is considering expanding its hours to 24 hours per day, Monday through Saturday, and 16 hours on Sunday