This is practice for my applied business decisions class, please help me firgure how to claculage this.

\begin{tabular}{|c|c|} \hline Weat & \begin{tabular}{c} Soles (1,000s \\ of gatinns) \end{tabular} \\ \hline 1 & is \\ \hline 2 & 72 \\ \hline 1 & 29 \\ \hline 4 & 24 \\ \hline 3 & 13 \\ \hline 4 & \\ \hline 7 & 21 \\ \hline 3 & 19 \\ \hline 3 & \\ \hline ta & \#1 \\ \hline 11 & \\ \hline 11 & 22 \\ \hline \end{tabular} \begin{tabular}{|c|c|c|} \hline wewk & \begin{tabular}{c} time serien \\ Yilen \end{tabular} & \\ \hline 1 & in & \\ \hline 2 & 2x & \\ \hline 3 & a. & \\ \hline 4 & 14. & \\ \hline * & is & \\ \hline s & E. & \\ \hline+ & is & \\ \hline " & 14 & \\ \hline 1 & is & \\ \hline 11 & 11 & \\ \hline 14 & if & \\ \hline 18 & is & \\ \hline \end{tabular} 18