Nakamichi Bancorp has made an investment in banking software at a cost of $1,773,000. Management expects productivity gains and cost savings over the next several years. If, as a result of this investment, the firm is expected to generate additional cash flows of $643,368, $844,021, $506,055, and $335,046 over the next four years, what is the investment’s payback period? (Round answer to 2 decimal places, e.g. 15.25.) Payback period is _years