An investment project provides cash inflows of $645 per year for eight years. What is the project payback period if the initial cost is $1, 550? (Enter 0 if the project never pays back. Do not round intermediate calculations and round your answer to 2 decimal places, (e.g., 32.16)) What is the project payback period if the initial cost is $3, 300? (Enter 0 if the project never pays back. Do not round intermediate calculations and round your answer to 2 decimal places, (e.g., 32.16)) What is the project payback period if the initial cost is $5, 400? (Enter 0 if the project never pays back. Do not round intermediate calculations and round your answer to 2 decimal places, (e.g., 32.16))