A new project will cost $$10400$ and will produce expected cash flows of $$4500,$ $$6600,$ $$3800,$ and $$1200$ over the next four years, respectively. What is the payback period? $1\mathrm{.}89$ years, $2\mathrm{.}61$ years, $1\mathrm{.}20$ years, or $3\mathrm{.}47$ years