Crane Bancorp has made an investment in banking software at a cost of$$1,856,200.$ If management expects productivity gains and cost savings to generate additional cash flows of$$606,900,$$$697,600,$$$529,600,$ and$$392,760$over the next four years, what is the investment's payback period? $($Round answer to $2$ decimal places, e$.$g$.15\mathrm{.}25.)$ Payback period isyears