You have estimated initial investment of $400,000, with new cash inflows of $110,000 each year. What is the payback period?

You have estimated an initial investment of $150,000, with new cash inflows of $40,000 each year, indefinitely. What is the payback period?

You have estimated an initial investment of $200,000, with new cash inflows of $50,000 each year, indefinitely. What is the payback period?