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REN OS aigin for each method. a) Periodic FIFO Cost of Goods Available for Sale Cost of Goods Sold Ending Inventory # of units |cost per Costof Goods unit Ava Cost of Goods | # of units | Cost per | # of units unit Goods Sold in ending ost Ending | Cost of Sale sold inventory per unit Inven Beginning inventory Purchases March 14 July 30 October 26 Total b) Periodic LIFO Cost of Goods Available for Sale Cost of Goods Sold Ending Inventory # of units | Cost per Costof Goods uniter! Available for | | Cost of | units Goods Sold in endingCost Ending # of units | Cost per | Cost of in Sale unit Goods Sold inventory per unit Inventory Beginning inventory Purchases March 14 July 30 October 26 Total c) Gross Margin FIFO LIFO