An investment project provides cash inflows of $600 per year for eight years. What is the project payback period if the initial cost is $1,725? (Do not round intermediate calculations. Enter 0 if the project never pays back. Round your answer to 2 decimal places, e.g., 32.16.) Payback period years What is the project payback period if the initial cost is $3,350? (Do not round intermediate calculations. Enter 0 if the project never pays back. Round your answer to 2 decimal places, e.g., 32.16.) Payback period years What is the project payback period if the initial cost is $5,000? (Do not round intermediate calculations. Enter 0 if the project never pays back. Round your answer to 2 decimal places, e.g., 32.16.) Payback period years