A machine costs $1,000 and has a 3-year life. The estimated salvage value at the end of three years is $100. The project is expected to generate after tax-cash flows of $600 per year. If the required rate of return is 10%, what is the NPV of the project? (Do not round intermediate computations)

a. $1,567
b. $492
c. $567
d. $1,492