rmy Compute the payback period for each of these two separate investments a. A new operating system for an existing machine is expected to cost $240,000 and have a useful life of four years. The system yields an incremental after-tax income of $69.230 each year after deducting its straight line depreciation. The predicted salvage value of the system is $9,000 b. A machine costs $200,000, has a $13,000 salvage value, is expected to last eight years, and will generate an after-tax income of $38,000 per year after straight-line depreciation ok Payback Period Choose Denominator Choose Numerator: 1 Payback Period Payback period aces a b