Rart3-Inventory (12 Marks) On October 15 , Arrow ine sold 750 units for 545 each on account a) Uaing the FIFO method of irventery costing calculate: Coit of Coods 50 id (2 Marks): Ending inwentory (2 Marks): b) Using the Weighted A verane method of inventory costing. calculate: Cost of Goods Sold (2 Marks): Ending inventory (2. Marks) c) Using the Welahted Average method of inventory costing, record the joumal entry for Avrow inc's sale