3. Using LIFO, calculate ending inventory and cost of goods sold at October 31.

4. Using weighted-average cost, calculate ending inventory and cost of goods sold at October 31.

Required information [The following information applies to the questions displayed below.] Sandra's Purse Boutique has the following transactions related to its top-selling Gucci purse for the month of October. Sandra's Purse Boutique uses a periodic inventory system. Unit Cost $ 850 Total Cost $ 5,100 860 4,300 Date October 1 October 4 October 10 October 13 October 20 October 28 October 30 Transactions Beginning inventory Sale Purchase Sale Purchase Sale Purchase Units 6 4 5 3 4 7 8 870 3,480 880 7,040 $19,920