Compute the payback period for each of these two separate investments: a. A new operating system for an existing machine is expected to cost $260,000 and have a useful life of six years. The system yields b. A machine costs $210,000, has a $14,000 salvage value, is expected to last nine years, and will generate an after-tax income of an incremental after-tax income of $75,000 each year after deducting its straight-line depreciation. The predicted salvage value of the system is $10,000 $41,000 per year after straight-ine depreciation. Payback Period Choose Numerator: Choose Denominator: Payback Period Payback period b