Both Dave and Kelly own auto parts stores. The following information is available for 1999 and 2000

\begin{tabular}{|c|c|c|}
\hline & Dave & Kelly \\
\hline \multicolumn{3}{|l|}{ Gross margin } \\
\hline 1999. . . . . . . . . . . . . . . . . . . . . & $\$ 150,000$ & $\$ 300,000$ \\
\hline 2000. . . . . . . . . . . . . . . . & 130,000 & 350,000 \\
\hline \multicolumn{3}{|l|}{ Ending inventory } \\
\hline 1999. . . . . . . . & 75,000 & 225,000 \\
\hline 2000. . . . . . . . . . . . . . . . . . . . . . . . . . . & 55,000 &  \\
\hline \end{tabular}
1. Calculate each company's turnover for inventory for 2000 .
2. Which owner manages its inventory better? Explain your answer.