HR Personnel Company wants to purchase a new computer system for screening candidates that would cost $60,000 and have a 6-year useful life and zero salvage value. Expected changes in annual revenues and expenses if the new machine is purchased are: a Increased revenues $65,000 Increased expenses: Salary of additional operator $22,000 Supplies 9,000 Depreciation 10,000 Maintenance 4,000 45,000 Increased net income $20,000 Required: (Show all calculations): 1. Compute the payback period on the new computer system. 2. Compute the simple rate of return on the new computer system