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Thelen's inventory records show the following data at January 31: Beginning inventory Jan. 1 Jan. 10 purchase Jan. 22 purchase 110 units at $7 per unit 320 units at $13 per unit 110 units at $14 per unit At January 31, 180 units are still on hand. What is the cost of the ending inventory at January 31 if Thelen uses the LIFO method? O A. $1,750 OB. $1,680 O C. $1,260 OD. $2,520