Sales during the year were 1,020 units. Beginning inventory was 330 units at a cost of $5 per unit. Purchase 1 was 510 units at $6 per unit. Purchase 2 was 790 units at $7 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 of Goods # of Cost per Available for units unit Sale $ 0 # of units sold Cost per unit Cost of Goods Sold Inventory Balance # of units in ending Cost per Ending unit Inventory inventory Beg. Inventory Purchases: Purchase 1 Purchase 2 0 0 Total 0 0 $ 0 0 $ 0 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 Cost per unit Inventory Balance # of units Cost per Ending in ending unit inventory Inventory Cost of Goods Sold sold $ 0 Beg. Inventory Purchases: Purchase 1 Purchase 2 Total 0 0 0 $ 0 0 $ 0 0 0 $ 0