Answer: Hiring a new employee to cover the added hours will cost $160 less than paying overtime to the three present employees.
Step-by-step explanation:
Find the cost of paying the employees at the present hours, 120 hours per week at $9 per hour plus benefits. That's $360 plus $200 per employee per week. $560
If the store is open an additional 40 hours, the overtime at $18 per hour will cost $720.
The difference is 720 - 560 = 160