Craylon Corp Has Three Divisions,which Operate Autonomously The Company's Desired Rate of Return Is 15

Craylon Corp has three divisions,which operate autonomously.Their results for 2015 were as follows:
$$\begin{array} { | l | r | r | r | } \hline & \text { East } & \text { West } & \text { International } \\\hline \text { Sales } & \$ 30,000,000 & \$ 40,000,000 & \$ 50,000,000 \\\hline \text { Cost of goods sold } & 15,000,000 & 25,000,000 & 37,000,000 \\\hline \text { Operating income } & 4,500,000 & 5,000,000 & 5,500,000 \\\hline \text { Investment base } & 30,000,000 & 32,000,000 & 34,000,000 \\\hline\end{array}$$ The company's desired rate of return is 15%.
Required:
a.Compute each division's ROI.Round to three decimal places.
b.Compute each division's residual income.