Herring Corporation has operating income of $$250,000$ and a $25\%$ tax rate. The firm has short$-$term debt of $$134,000,$ long$-$term debt of $$337,000,$ and common equity of $$471,000.$ What is its return on invested capital?

a$.26\mathrm{.}54\%$

b$.39\mathrm{.}81\%$

c$.30\mathrm{.}99\%$

d$.23\mathrm{.}21\%$

e$.19\mathrm{.}90\%$