can anyone explain why we multiply 2000 by 5.30 and 2000 by 5.50 when we have 6000 of total units sold out? Aug 14

Exercise 815 Last-in, first-out (LIFO) Date Purchased Sold Balance 2,000 @ $5.30 = $10,600 2,000 @ $5.30 $10,600 Beginning inventory August 8 8,000 @ $5.50 = $44,000 2,000 @ $5.30 8,000 @ $5.50 $54,600 August 14 6,000 @ $ 5.50 = $33,000 2,000 @ $5.30 2,000 @ $5.50 $21,600 August 18 6,000 @ $5.60 = $33,600 2,000 @ $5.30 2,000 @ $5.50 6,000 @ $5.60 $55,200 August 25 1,000 @ $5.50 = 6,000 @ $5.60 = $ 5,500 $33,600 2,000 @ $5.30 1,000 @ $5.50 $16,100 August 28 4,000 @ $5.80 = $23,200 2,000 @ $5.30 1,000 @ $5.50 4,000 @ $5.80 $39,300 Ending inventory Total cost of goods sold $72,100 E 8-15 LIFO; perpetual system CL08-1, L08-4 [This is a variation of QE 8-14 modified to focus on LIFO in a perpetual inventory system.] Altira Corporation provides the following information related to its merchandise inventory during the month of August 2021: Aug. 1 Inventory on hand2,000 units; cost $5.30 each. 8 Purchased 8,000 units for $5.50 each. 14 Sold 6,000 units for $12.00 each. 18 Purchased 6,000 units for $5.60 each. 25 Sold 7,000 units for $11.00 each. 28 Purchased 4,000 units for $5.80 each. 31 Inventory on hand-7,000 units