Answer:
$4,817.17
Explanation:
The net present value is the present value of after tax cash flows substracted from the amount invested.
Using a financial calculator:
Cash flow for year zero = -$25,000
Cash flow for year one = -$8,000
Cash flow for year two = $16,000
Cash flow for year three = $16,000
Cash flow for year four = $16,000
I = 9%
NPV = $4,817.17
I hope my answer helps you.