a. A new operating system for an existing machine is expected to cost $820,000 and have a useful life of six years. The system yields an incremental after-tax income of $240,000 each year after deducting its straight-line depreciation. The predicted salvage value of the system is $100.000 b. A machine costs $560,000, has a $56,000 salvage value, is expected to last eight years, and will generate an after-tax income of $150,000 per year after straight-line depreciation. Assume the company requires a 12% 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 $560,000, has a $56,000 salvage value, is expected to last eight years, and will generate an after-tax income of $150,000 per year after straight-line depreciation. (Round your answers to the nearest whole dollar.) Cash Flow Select Chart Amount x PV Factor - Present Value Annual cash flow Residual value Net present value