Brookman Inc's latest EPS was $$2\mathrm{.}75,$ its book value per share was $$21\mathrm{.}07,$ it had $315,000$ shares outstanding, and its debt$/$total invested capital ratio was $44\%.$ The firm finances using only debt and common equity, and its total assets equal total invested capital. How much debt was outstanding? Do not round your intermediate calculations.

a$.$ $$8,447,155$

b$.$ $$4,534,200$

c$.$ $$5,214,825$

d$.$ $$5,770,800$

e$.$ $$6,637,050$