Ajax Corp's sales last year were $$530,000,$ its operating costs were $$426,000,$ and its interest charges were $$12,500.$ What was the firm's times$-$interest$-$earned $($TIE$)$ ratio?

a$.8\mathrm{.}32$

b$.5\mathrm{.}49$

c$.9\mathrm{.}32$

d$.6\mathrm{.}99$

e$.7\mathrm{.}32$