Mau Plumbing recently reported $$20\mathrm{.}00$ million of sales, $$12\mathrm{.}60$ million of operating costs other than depreciation, and $$3\mathrm{.}00$ million of depreciation. It had $$8\mathrm{.}50$ million of bonds outstanding that carry a $7\mathrm{.}0\%$ interest rate, and its federal$-$plus$-$state income tax rate was $40\%.$ What was Mau's operating income, or EBIT, in millions?

a$.$ $$4,40$

b$.$ $$3\mathrm{.}83$

c$.$ $$4\mathrm{.}27$

d$.$ $$3\mathrm{.}56$