You are trying to value Stanley Motors, a mature auto company. In the most recent year, the company reported $$20$ million in after$-$tax operating income on revenues of $$1$ billion, largely the economy was in a recession. If the average after$-$tax operating margin for Stanley Motors over the entire economic cycle is $6\%$ and the company has invested capital of $$400$ million, what normalized return on capital does the company generate?

a$.2\%$

b$.5\%$

c$.6\%$

d$.150$

$(2\mathrm{.}1300002040026\%$

$40000$

$13\%$