Sandra's Purse Boutique has the following transactions related to its top-selling Gucc/purse for the month of October Sandra's Purse Boutique uses a periodic inventory system. Date Total Cost Units 6 Unit Cost $790 $ 4,740 Transactions Beginning inventory Sale Purchase Sale Purchase Sale Purchase 800 October 1 October 4 October 10 October 13 October 20 October 28 October 30 4,000 00 Awit 810 3,240 820 6,560 $18,540 2. Using FIFO, calculate ending inventory and cost of goods sold at October 31. Ending inventory Cost of goods sold