Consider the following data in relation to the purchase of identical units. Date Units Type Inventory (Beg. Inv.) January 1 Cost per Unit ($) 3 250 April 20 Purchases 320 7 June 10 Purchases 180 7 November 25 Purchases 250 11 Physical inventory on December 31 is 300 units. (End. Inv.) a) Using First-in. First-out (FIFO) method, cost of goods sold (COGS) is $ b) Using weighted average cost method, ending inventory is s