Wildhorse Bancorp has made an investment in banking software at a cost of $1.836,200. If management expects productivity gains and cost savings to renerate additionsl eash flows of $556,900,$717,600,$519,600, and $342,760 over the next four years, what is the investment's payback period? (Round answer to 2 decimal places, es. 15.25.) Payback period is years