The accounting records of Shumway Ag Implement show the following. Unit Cost $3 1/1 Beginning Inventory 1/20 Purchase 7/25 Sale Units 4,000 6,000 5000 Total Cost S 12000 24,000 12 Total 10,000 S36,000 A Physical Count of Merchandise inventory on July 31 reveals that there are 2000 units on hand Requirement: Determine the cost of goods sold during the period under a periodic inventor system using A) The FIFO method B) The average cost method