Required : 1 ) Calculate the total amount to be assigned to the Cost of Goods Sold to ending 20 x 2 and the ending inventory on December 31 under each of the periodic inventory methods : a ) FIFO ; b ) LIFO , C ) Weighted average ( round 2 decimal places ). 1a ) FIFO method :" Cost of Goods Si Date Event Units * Unit Price* = January 1 , 20 X 2 Beg . Inventory 1500 10