Required information [The following information applies to the questions displayed below.) Alexandra's Boutique has the following transactions related to its top-selling Gucci purse for the month of October. Alexandra's Boutique uses a periodic inventory system. Date October 1 October 4 October 10 October 13. Transactions Beginning inventory Sale Purchase Sale October 20 Purchase October 28 Sale October 30 Purchase Units 6 Unit Cost Total Cost $720 $4,320 730 3,650 740 2,960 750 4,500 $15,430 3. Using LIFO, calculate ending inventory and cost of goods sold at October 31. Ending inventory Cost of goods sold