An investment project provides cash inflows of $1,375 per year for eight years. (Enter 0 if the project never pays back. Do not round intermediate calculations and round your answers to 2 decimal places, e.g., 32.16.) What is the project payback period if the initial cost is $4,300? Payback period years What is the project payback period if the initial cost is $5,350? Payback period years What is the project payback period if the initial cost is $12,000? Payback period years