1\documentclass{article}
2\usepackage{lscape}
3\thispagestyle{empty}
4\begin{document}
5\setcounter{equation}{0}
6\begin{tabular}{||l|lr||}
7\hline
8gnats     & gram    & \$13.65 \\
9\hline
10          & each    &     .01 \\
11\hline
12gnu       & stuffed &   92.50 \\
13\cline{1-1} \cline{3-3}
14emur      &         &   33.33 \\
15armadillo & frozen  &    8.99 \\
16\hline
17\end{tabular}
18\end{document}