Ch 11Ex 115 Exercise 11-5 Paybeck period computation; even cash flows LO P1 Compute the payback period for each of these two separate investments 5 pores A new operating system for an existing machine s expected to cost $270000 and have a useful life of four years. The system ynelds an incremental after tax income of $77884 each year after deducting its straight-line depreciation. The predikted saivage value of the system is $10000 b. A machine coss $170000, has a $14,000 salvage value s expected to last eight years, and wn generate an atter ax income of $43.000 per year after straight line depreciation Choose hN s Payback period