A company must install a pollution control device. They are considering two devices. Both alternatives have a life of 10 years. The cost data is given below. What is the payback period if the second device is chosen? If the company has a MARR of 8%, use benefit cost ratio method to determine the preferred device. A B 1 5t Cost $300,000 $375,000 Annual Expenses 50,000 35,000 Salvage Value 30,000 40,000