find the projects' discounted payback period

Project A, which costs $1,000 to purchase, will generate net cash inflows equal to $500 at the end of each of the next three years. The project's required rate of return is 10 percent. What are the project's discounted payback period (DP)? a. 1.98 b. 2.35 c. 2.64 d. 2.14 e. 2.46