\begin{table}%TB1
	\caption{Estimated yearly operating costs of a zenith telescope using a 4-m liquid mirror (costs are in units of 1000.0  US\$).}
	\label{tab:5}
		%\centerline
{
		\begin{tabular}{l c}
		\hline
		\hline
		\multicolumn{2}{c}{LABOR$^{1}$} \\
		\hline
		Site Maintenance & 9.4 \\
		Site Engineering & 7.4 \\
		Machinist (Skilled) & 7.8 \\
		Operator & ??? \\
		\hline
		Total & 24.6$^{2}$\\
		\hline
		\hline
		\multicolumn{2}{c}{UTILITIES$^{1}$}\\
		\hline
		Electric & 1.5 \\
		Telecom & 2.4 \\
		Propane & 2.0 \\
		Overhead & 1.2 \\
		\hline
		Total & 7.1 \\
		\hline
		\hline
		\multicolumn{2}{c}{EQUIPMENT + CONSUMABLE$^{1}$}\\
		\hline
		Exabyte tapes & 1.8\\
		Safety & 1.0\\
		Miscel. Cons. & 0.5\\
		Shipping & 5.0\\
		Overhead & 1.7 \\
		\hline
		Total & 10 \\
		\hline
		\hline
		\textbf{Grand Total} & \textbf{41.7$^{3}$}\\
		\hline
	\end{tabular}}
\par
	\medskip
	$^{1}$ Appendix~\ref{sec:app_2} discusses how these estimates were obtained.\\
	$^{2}$ Does not include operator(s) salaries.\\
	$^{3}$ Includes neither operator(s) salaries nor travel costs.
\end{table}