The beginning inventory was 340 units at a cost of $13 per unit. Goods available for sale during the year were 1,420 units at a total cost of $19,980. In May, 640 units were purchased at a total cost of $8,960. The only other purchase transaction occurred during October. Ending inventory was 610 units. Required: a. Calculate the number of units purchased in October and the cost per unit purchased in October. Purchased in October Number of units Cost per unit 440 $ 15 b-1. 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.) Cost of Goods Available for Sale Periodic FIFO Cost of Goods Sold 8888888 Inventory Balance # of units Cost per Cost of Goods Available for #of units in # of units unit sold. Cost per unit Cost of Goods Sold Sale ending inventory Cost per unit Ending Inventory Beg. Inventory 340 $ 13 $ 4.420 340 $ 13 $ 4.420 Purchases: May 640 14 8,960 470 14 6,580 170 14 2,380 October 440 15 6,600 440 15 6,600 Total 1,420 $ 19,980 810 $11.000 610 8,980 b-2. 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.) Cost of Goods Available for Sale Cost of Goods Sold Periodic LIFO # of units Cost per unit Cost of Goods # of units Available for sold Cost per unit Sale Cost of Goods Sold # of units in ending inventory Inventory Balance Cost per unit Ending Inventory Beg. Inventory Purchases: 340 $ 13 $ A420 440 $ 13 $ 5,720 May 640 14 8.960 370 14 5,180 340 14 4,760 October 440 15 6,600 270 15 4,050 Total 1,420 $ 19,980 810 $ 10,900 610 $ 8,810