Calculate Cost and Refund (Use Table in Text If Needed)

Short Answer

Calculate cost and refund (use table in text if needed):
$$\begin{array} { | l | l | l | l | l | } \hline \text { Annual Premium } & \text { Canceled After } & \text { Canceled By } & \text { Premium Cost } & \text { Refund } \\\hline \$ 400 & 6 \text { Months } & \text { Insured } & \text { A } & \text { B } \\\hline \$ 800 & 9 \text { Months } & \text { Insurer } & \text { C } & \text { D } \\\hline\end{array}$$