Compute the payback period for each of these two separate investments: a. A new operating system for an existing machine is expected to cost b. A machine costs $170,000, has a $14,000 salvage value, is expected to last eight years, and will $270,000 and have a useful life of four years. The system yields an incremental after-tax income of $77,884 each year after deducting its straight-line depreciation. The predicted salvage value of the system is $10,000 generate an after-tax income of $43,000 per year after straight-line depreciation Choose Denominator:Payback period Payback period 2700|years- Choose Numerator: Cost of investment . / Annual net cash flow | = | 270,000s 10.0001 = 10000|