$4$ The following is from the records of Big Corp. which uses the perpetual method.

A$.$ Calculate the total dollar amount for goods available for the month of May:

B$.$ Determine the number of units in the ending inventory at May $31.$

C$.$ Determine the total sales for the month

D$.$ Calculate the dollar amounts of ending inventory and cost of goods sold and gross profit using the

FIFO METHOD.

Cost of Goods Sold

Gross Profit

E$.$ Calculate the dollar amounts of ending inventory and cost of goods sold and gross profit using the

LIFO METHOD.

Cost of Goods Sold

Gross Profit