show computation for FTES & salary subtotals

\begin{tabular}{|l|c|l|c|r|r|r|} \hline Positions & FTEs & \multicolumn{1}{|c|}{ Salary } & \multicolumn{1}{|c|}{ Hours } & \begin{tabular}{c} Salary \\ Subtotals \end{tabular} & \multicolumn{1}{c|}{ Benefits } & \multicolumn{1}{c|}{ Total } \\ \hline Manager & 1 & $90,000.00 & XXXXX & $90,000 & $31,500 & $121,500 \\ \hline AHN & 1 & $69,000 & XXXXX & $69,000 & $24,150 & $93,150 \\ \hline RN & 31 & 37.00 & 2080 & $2,385,760 & $835,016 & $3,220,776 \\ \hline LVN & 2.5 & 26.00 & 2080 & $135,200 & $47,320 & $182,520 \\ \hline NA & 7.5 & 15.00 & 2080 & $234,000 & $81,900 & $315,900 \\ \hline \end{tabular}