An investment project has annual cash inflows of $6,000, $6,500, $7,000, and $8,000, and a discount rate of 20 percent. (Do not round intermediate calculations. Round the final answers to 2 decimal places.)

a. What is the discounted payback period for these cash flows if the initial cost is $8,000?

Discounted payback period years

b. What is the discounted payback period for these cash flows if the initial cost is $12,500?

Discounted payback period years

c. What is the discounted payback period for these cash flows if the initial cost is $15,000?

Discounted payback period years