Sandras 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. Date Transactions Units Unit Cost Total Cost October 1 Beginning inventory 6 $900 $5,400 October 4 Sale 4 October 10 Purchase 5 910 4,550 October 13 Sale 3 October 20 Purchase 4 920 3,680 October 28 Sale 7 October 30 Purchase 7 930 6,510 $20,140 2. Using FIFO, calculate ending inventory and cost of goods sold at October 31