Answer:
a) under FIFO
COGS = $461
ending inventory = $120
b) under LIFO
COGS = $491
ending inventory = $90
Step-by-step explanation:
inventory:
March 3 Inventory 12 units at $15
March 11 Purchase 13 units at $17
March 14 Sale 18 units
March 21 Purchase 9 units at $20
March 25 Sale 10 units
under FIFO COGS:
March 14
Dr Cost of goods sold 282
Cr Merchandise inventory 282
March 25
Dr Cost of goods sold 179
Cr Merchandise inventory 179
under LIFO COGS:
March 14
Dr Cost of goods sold 296
Cr Merchandise inventory 296
March 25
Dr Cost of goods sold 195
Cr Merchandise inventory 195