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: $65,000 $22,000 Increased revenues Increased expenses: Salary of additional operator Supplies Depreciation Maintenance Increased net income 9,000 10,000 4.000 45.000 $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