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Purchases Cost Balance Units Total Cost of Goods Sold Cost Total Date Apr. 1 Units Units Cost Total 15 $25 $375 6 30 $660 [2] [3] [4] [5] $ [6] $ 9 15 [? 11 [B] $ [9] [10] [11] [12] 14 [13] $10 $100 (14) (15) (16) [171 (18)