12-41. Dorothy & George Company is planning to acquire a new machine at a total cost of $30,600. The machine's estimated life is six years and its estimated salvage value is $600. The company estimates that annual cash savings from using this machine will be $8000. The company' safter tax cost of capital is 8% and its income tax rate is 40%. The company uses straight-line depreciation (non-MACRS-based).

Required:

1. What is this investment's net after-tax annual cash inflow?

2. Assume that the net after-tax annual cash inflow of this investment is $5000; what is the payback period?

3. Assume that the net after-tax annual cash inflow of this investment is $5000; what is the net present value (NPV) of this investment?

4. What are the minimum net after-tax annual cost savings that make the proposed investment acceptable (i.e., the dollar cost savings that would yield an NPV of $0)?