If Dunkin Donuts spends $$243,000$ on flour and makes $270,000$ donuts, what is the cost that would be assigned to each donut if the company uses the process cost system? $($Show your work.$)$

A$)$ $$1\mathrm{.}80$ per donut

B$)$ $$0\mathrm{.}90$ per donut

C$)$ $$0\mathrm{.}45$ per donut

D$)$ $$3\mathrm{.}60$ per donut