Explanation:
For computing the inventory cost and the cost of merchandise sold by three methods, first we have to find out the average unit price which is shown below:
Average unit price equals to
= Total amounts ÷ Total units
where,
Total amount = 1,800 units × $108 + 2,240 units × $110 + 2,000 units × $116 + 1,960 units × $120
= $194,400 + $246,400 + $232,000 + $235,200
= $908,000
Total units
= 1,800 units + 2,240 units + 2,000 units + 1,960 units
= 8,000 units
So, the average unit price is
= $908,000 ÷ 8,000 units
= $113.50
Now the inventory cost and the cost of merchandise sold by three methods are as follows:
Under the FIFO method
Inventory
= 40 units × $116 + 1,960 units × $120
= $4,640 + $235,200
= $239,840
Cost of goods sold
= $908,000 - $239,840
= $668,160
Under the LIFO method
Inventory
= 1,800 units × $108 + 200 units × $110
= $194,400 + $22,000
= $216,400
Cost of goods sold
= $908,000 - $216,400
= $691,600
Under the weighted average cost
Inventory
= 2,000 × $113.50
= $227,000
Cost of goods sold
= $908,000 - $227,000
= $681,000