Problem 7

Need help with the grey high-lighted areas, please include formulas!

\begin{tabular}{|c|c|c|c|c|c|} \hline \multirow{3}{*}{\begin{tabular}{ll} 17 & 2 \\ 18 & \\ 19 & \end{tabular}} & \multicolumn{2}{|c|}{ What is the payback period for each product? } & & & \\ \hline & \multirow[b]{2}{*}{ Year } & \multicolumn{2}{|c|}{ Product A } & \multicolumn{2}{|c|}{ Product B } \\ \hline & & Cash Flow & Aggregate & Cash Flow & Aggregate \\ \hline 20 & & & & & \\ \hline 21 & & & & & \\ \hline 22 & & & & & \\ \hline 23 & & & & & \\ \hline 24 & & & & & \\ \hline 25 & & & & & \\ \hline 26 & & & & & \\ \hline 27 & & Full Year & & Full Year & \\ \hline 28 & & Partial Year & & Partial Year & \\ \hline 29 & & Payback & & Payback & \\ \hline \end{tabular} \begin{tabular}{|c|c|c|c|c|c|} \hline \multirow{3}{*}{\begin{tabular}{ll} 17 & 2 \\ 18 & \\ 19 & \end{tabular}} & \multicolumn{2}{|c|}{ What is the payback period for each product? } & & & \\ \hline & \multirow[b]{2}{*}{ Year } & \multicolumn{2}{|c|}{ Product A } & \multicolumn{2}{|c|}{ Product B } \\ \hline & & Cash Flow & Aggregate & Cash Flow & Aggregate \\ \hline 20 & & & & & \\ \hline 21 & & & & & \\ \hline 22 & & & & & \\ \hline 23 & & & & & \\ \hline 24 & & & & & \\ \hline 25 & & & & & \\ \hline 26 & & & & & \\ \hline 27 & & Full Year & & Full Year & \\ \hline 28 & & Partial Year & & Partial Year & \\ \hline 29 & & Payback & & Payback & \\ \hline \end{tabular}