Rail Star Company Reported the Following Results for 2014 $\begin{array}{lr}\text { Sales } & \$ 6,000,000 \\\text { Investment turnover } & 2.4 \\\text { Return on investment } & 10 \%\end{array}$

Rail Star Company reported the following results for 2014: $\begin{array}{lr}\text { Sales } & \$ 6,000,000 \\\text { Investment turnover } & 2.4 \\\text { Return on investment } & 10 \%\end{array}$ Given this information, how much is the company's invested capital?

A) $2,500,000
B) $1,440,000.
C) $600,000
D) $1,440,000