Ending inventory consists of 55 units from the March 14 purchase, 70 units from the July 30 purchase, and all 140 units from the October 26 purchase. Using the specific identification method, calculate the following. a) Cost of Goods Sold using Specific Identification Available for Sale Cost of Goods Sold Ending Inventory Date Activity # of units Cost Per Unit of units Cost Per COGS sold Unit Ending Inventory Units Cost Per Unit Ending Inventory Cost January 1 Beginning Inventory 240 $ 11.60 240 $ 11.60 $ 2.784 0 $ 11.60 $ March 14 Purchase 370 $16.601 $ 16.60 0 55 5 16.60 913 July 30 Purchase 440 $ 21.60 $ 21.60 0 70 5 21.60 1512 October 26 Purchase 140 $ 26.60 0 $ 26.60 140 S 26 60 3,724 1,190 240 $ 2,784 265 S 6,149) b) Gross Margin using Specific Identification. Sales Less Cost of goods sold Equals: Gross profit +