An investment project provides cash inflows of $620 per year for 12 years. a. What is the project payback period if the initial cost is $2,480 ? Payback period b. What is the project payback period if the initial cost is $3,844 ? c. What is the project payback period if the initial cost is $8,060 ? An investment project provides cash inflows of $620 per year for 12 years. a. What is the project payback period if the initial cost is $2,480 ? Payback period b. What is the project payback period if the initial cost is $3,844 ? c. What is the project payback period if the initial cost is $8,060