问题如下：
The Grace Corp invested a project with the initial investment of $10,000. This project will generate cash inflows presented below:
Year 1: $5,000
Year 2: $4,000
Year 3: $3,000
Year 4: $2,000
What is the project's discounted payback period assume the required rate of return is 10%?
选项：
A. 2.0 years.
B. 2.33years.
C. 2.95 years.
解释：
C is correct.
Discounted payback period =2+2149/2254=2.95 years.
这个有没有可能用计算器算出来