Which of the following units has the best productivity?

\begin{tabular}{|c|c|c|c|c|c|c|c|c|c|} \hline & & Location & & & Location & & & Location & \\ \hline Covers & & 4,800 & & & 4,950 & & & 5,000 & \\ \hline Average Check & $ & 10.50 & & $ & 11.25 & & $ & 12.80 & \\ \hline Revenue & $ & 50,400 & & $ & 55,688 & & $ & 64,000 & \\ \hline Server Man Hours & & 1,680 & 0.350 & & 1,708 & 0.345 & & 1,760 & 0.352 \\ \hline Server Wage Rate & $ & 7.25 & & $ & 8.00 & & $ & 7.25 & \\ \hline Server Taxes and Benefit Rate & $ & 3.63 & & $ & 4.00 & & $ & 3.63 & \\ \hline Server Labor Expense & $ & 18,270 & 36.3% & $ & 20,493 & 36.8% & $ & 19,140 & 29.9% \\ \hline \end{tabular}