Question: Northern Specialties just purchased inventory-management computer software at a cost of $1, 684, 950. Cost savings from the investment over the next six years will produce the following cash flow stream: $251, 340, $221, 240, $455, 600, $493, 250, S745.320, and $553, 740. What is the payback period on this investment? (Round answer to 2 decimal places, e.g. 15.25.) Payback period is _________ years