If a retail purchasing manager orders $30$ foam rubber U of M Wolverine claws at $$2\mathrm{.}50$ per claw and sells $12$ of them in a week, then the Cost of Goods Sold for the claws that week is $\_\_\_\_.$

A$.$

$$45$

B$.$

$$2\mathrm{.}50$

C$.$

$$75$

D$.$

$$90$