Periodic System$-$Calculating Ending Inventory and Cost of Sales Using Average Cost, FIFO, and LIFO

a$.$ Compute ending inventory and cost of goods sold for the quarter ended March $31$ using $(1)$ Average cost method, $(2)$ FIFO method, $(3)$ and the LIFO method.

FIFO LIFO Analysis

$(1)$ Average cost method

$-$Note: Use the result EXACTLY as displayed above in the calculations below.

$-$Note: Do not use negative signs with any of your answers.