An investment project provides cash inflows of $875 per year for eight years. (Do not round intermediate calculations. Round your answers to 2 decimal places (e.g., 32.16). Enter "0" if the payback period is never.)

What is the project payback period if the initial cost is $3,200?

What is the project payback period if the initial cost is $4,600?

What is the project payback period if the initial cost is $7,900?