Vasudevan Inc. recently reported operating income of $$6\mathrm{.}50$ million, depreciation of $$1\mathrm{.}20$ million, and had a tax rate of $25\%.$ The firm's expenditures on fixed assets and net operating working capital totaled $$0\mathrm{.}60$ million. How much was its free cash flow, in millions?

a$.$ $$6\mathrm{.}075$

b$.$ $$6\mathrm{.}675$

c$.$ $$5\mathrm{.}475$

d$.$ $$7\mathrm{.}700$

e$.$ $$7\mathrm{.}100$