Reference: 12-01
the Following Information Is Available on Company A

Reference: 12-01
The following information is available on Company A: $$\begin{array} { | l | l | } \hline \text { Sales } & \$ 900,000 \\\hline \text { Net operating income } & 36,000 \\\hline \text { Stockholders' equity } & 100,000 \\\hline \text { Average operating assets } & 180,000 \\\hline \text { Minimum required rate of return } & 15 \% \\\hline\end{array}$$
-Company A's residual income is?

A) $45,000.
B) $9,000.
C) $21,000.
D) $24,000.