Please show work step by step, NO EXCEL. Thank you!

A project's initial investment is $40,000, and it has a five year life. At the end of the fifth year, the equipment is expected to be sold for $12,000, at which time its net book value will be $5,000. The CFATs (including inflation, depreciation, and net salvage value) for the next five years are expected to be $20,000, $25,000, $10,000, $10,000 and $10,000. In real terms, the project's cost of capital is 10%, and the riskless return is 7%. The tax rate is 46%, and the inflation rate is 3%. What is the project's NPV?