10A. Serenity Books has the following transactions in August related to merchandise inventory (Click the icon to view the transactions.) Read the requirements a., b., and c. Determine the cost of goods sold and ending merchandise inventory using the (a) FIFO inventory costing method, (b) L.FO inventory costing method, and (c) weighted average inventory costing method assuming Serenity Books uses the periodic ifventory system (Round weighted average cost per unit to the nearest cent and atl other antounts to the noarest dollar) \begin{tabular}{l} Beginning Mer \\ \hline Plus: Net C. \\ Cost of Good \end{tabular}