Jan 1 beginning inventory 600 units @44/unit
Feb 10 purchase 200 units @40/unit
Mar 13 Purchase 100 units @20/unit
Mar 15 sales 400 units @75/unit
Aug 21 Purchase 160 units @60/unit
Sept 5 Purchase 280 units @48/unit
Sept 10 sales 200 unites @75/unit

Totals 1340 units (units acquired at cost)
Totals 600 units (units sold at retail)

Question 1:
Compute the cost assigned to ending inventory using (a) FIFO, (b) LIFO, (c) specific identification-units sold consist of 500 units from beginning inventory and 100 units from the March 13 purchase, and (d) weighted average.

Question 2:
Compute gross profit earned by the company for each of the four costing methods