Sales during the year were 1,220 units. Beginning inventory was 380 units at a cost of $6 per unit. Purchase 1 was 610 units at $7 per unit. Purchase 2 was 940 units at $8 per unit. Required: a. Assume the periodic inventory system is used. Calculate cost of goods sold and ending inventory using FIFO method. (Enter all values as a positive value.) Periodic FIFO Cost of Goods Sold Cost of Goods Available for Sale Cost per Cost of Goods # of Available for units unit Sale # of units sold Cost per unit Cost of Goods Sold Inventory Balance # of units Cost per Ending in ending unit Inventory inventory 0 Beg. Inventory Purchases: Purchase 1 Purchase 2 OOO Total 0 $ 0 $ O 0 $ 0 b. Assume the periodic inventory system is used. Calculate cost of goods sold and ending inventory using LIFO method. (Enter all values as a positive value.) Periodic LIFO Cost of Goods Sold Cost of Goods Available for Sale Cost of Goods # of Cost per Available for units unit Sale # of units sold Cost per unit Cost of Goods Sold Inventory Balance # of units Cost per Ending in ending unit Inventory inventory Beg. Inventory 0 Purchases: Purchase 1 Purchase 2 O Oo Total 0 $ 0 $ o $ 0