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Required information [The following information applies to the questions displayed below.] Trey Monson starts a merchandising business on December 1 and enters into the following three inventory purchases. Monson uses a perpetual inventory system. Also, on December 15, Monson sells 15 units for \$38 each. etermine the costs assigned to ending inventory when costs are assigned based on the weighted average method. ote: Round your per unit costs to 2 decimal places. \begin{tabular}{|c|c|c|c|c|c|c|c|c|c|} \hline \multicolumn{10}{|c|}{ Weighted Average - Perpetual: } \\ \hline \multirow[b]{2}{*}{ Date } & \multicolumn{3}{|c|}{ Goods purchased } & \multicolumn{3}{|c|}{ Cost of Goods Sold } & \multicolumn{3}{|c|}{ Inventory Balance } \\ \hline & \begin{tabular}{l} # of \\ units \end{tabular} & Cost per unit & Inventory Value & \begin{tabular}{l} # of \\ units \\ sold \end{tabular} & \begin{tabular}{c} Cost per \\ unit \end{tabular} & \begin{tabular}{c} Cost of Goods \\ Sold \end{tabular} & \# of units & Cost per unit & \begin{tabular}{r} Inventory \\ Balance \end{tabular} \\ \hline \multicolumn{10}{|l|}{ December 7} \\ \hline \multicolumn{10}{|l|}{ December 14} \\ \hline & & & & & & & & & \\ \hline \multicolumn{10}{|l|}{ Average cost December 14} \\ \hline \multicolumn{10}{|l|}{ December 15} \\ \hline \multicolumn{10}{|l|}{ December 21} \\ \hline & & & & & & & & & \\ \hline \multicolumn{10}{|l|}{ Average cost December 21} \\ \hline Totals & & & & & & & & & \\ \hline \end{tabular}