The Following Information Pertains to Singh Company Invested Capital Is Defined as Total Assets

The following information pertains to Singh Company:
$\begin{array}{ll}\text { Average total assets } & \$ 50,000 \\\text { Net operating profit after taxes } & \$ 15,000 \\\text { Total current liabilities } & \$ 30,000 \\\text { Total expenses } & \$ 60,000 \\\text { Total liabilities } & \$ 35,000 \\\text { Total revenues } & \$ 80,000\end{array}$
Invested capital is defined as total assets.The capital charge is 10%.What is the residual income?

A) $1,600
B) $10,000
C) $15,000
D) $20,000