Not sure what I am doing wrong, but I need help understanding this.

From the following, calculate the cost of ending inventory and cost of goods sold for the LIFO method, ending inventory is 51 units. Note: Round your answers to the nearest cent.

\begin{tabular}{lcc} Beginning inventory & \multicolumn{2}{c}{ Unit } \\ and purchases & Units & cost \\ January 1 & 5 & $3.20 \\ April 10 & 10 & 3.70 \\ May 15 & 12 & 4.20 \\ July 22 & 15 & 4.45 \\ August 19 & 18 & 5.20 \\ September 30 & 20 & 5.40 \\ November 10 & 32 & 5.60 \\ December 15 & 16 & 6.00 \end{tabular} \begin{tabular}{|l|l|} \hline Cost of ending inventory & \\ \hline Cost of goods sold & \\ \hline \end{tabular}