walmart wants to save costs each year for the next four years to fund a center. if they earn 6.5% on its cost savings how much will the firm have saved at the end of year 4? refer to the table

\begin{tabular}{|l|l|} \hline Year & Amount saved \\ \hline 1 & $20,000 \\ \hline 2 & $24,000 \\ \hline 3 & $28,000 \\ \hline 4 & $32,000 \\ \hline \end{tabular}