Final answer:
Using the Perpetual LIFO inventory valuation method, the cost of the ending inventory is $3,500.
Step-by-step explanation:
The Perpetual LIFO (Last-In, First-Out) inventory valuation method assumes that the most recent purchases are the first ones to be sold. In this case, the company had the following sales throughout the year:
January: 19 units
February: 18 units
May: 22 units
September: 21 units
November: 35 units
Based on the perpetual LIFO method, the cost of the ending inventory can be calculated by summing up the cost of the remaining units from each purchase:
January: 9 units remaining (28 - 19) x $210 = $1,890
February: 0 units remaining (38 - 18) x $215 = $0
May: 0 units remaining (33 - 22) x $220 = $0
September: 0 units remaining (30 - 21) x $225 = $0
November: 7 units remaining (28 - 35) x $230 = $1,610
Adding up these costs, the total cost of the ending inventory is $1,890 + $0 + $0 + $0 + $1,610 = $3,500.