a. A new operating system for an existing machine is expected to cost $560,000 and have a useful life of six years. The system yields an incremental after-tax income of $300,000 each year after deducting its straight-line depreciation. The predicted salvage value of the system is $18.400. b. A machine costs $450,000, has a $36,200 salvage value, is expected to last eight years, and will generate an after-tax income of $68,000 per year after straight-line depreciation. Assume the company requires a 10% rate of return on its investments. Compute the net present value of each potential investment (PV of $1. FV of $1. PVA of $1, and FVA of $1) (Use appropriate factor(s) from the tables provided.) Complete this question by entering your answers in the tabs below. Required A Required B A machine costs $450,000, has a $36,200 salvage value, is expected to last eight years, and will generate an after-tax income of $68,000 per year after straight-line depreciation. (Round your answers to the nearest whole dollar.) Select Chart Amount X PV Factor Cash Flow Annual cash flow Residual value Present Value S 0 0 Net present value