Sunland Specialties just purchased inventory-management computer software at a cost of $1,518,950. Cost savings from the investment over the next six years will produce the following cash flow stream: $181,340, $326,240, $332,600, $587,250, $802,320, and $687,740. What is the payback period on this investment? (Round answer to 2 decimal places,e.g. 15.25.)