Cullumber Specialties just purchased inventory-management computer software at a cost of $1,652,950. Cost savings from the investment over the next six years will produce the following cash flow stream: $180,340, $260,240, $295,600, $593,250, $716,320, and $767,740. What is the payback period on this investment? (Round answer to 2 decimal places,e.g. 15.25.)

Payback period is

______________

years