Cullumber Specialties just purchased inventory-management computer software at a cost of $1,786,950. Cost savings from the investment over the next six years will produce the following cash flow stream: $198,340, $299,240, $301,600, $641,250, $738,320, and $469,740. What is the payback period on this investment? (Round answer to 2 decimal places,e.g. 15.25.)