Sara's Boutique has the following transactions related to its top-selling Gucci purse for the month of October. Sara's Boutique uses a periodic inventory system. Date October 1 Transactions Beginning inventory October 4 Sale October 10 Purchase October 13 Sale October 20 Purchase October 28 Sale October 30 Purchase Units 6 Unit Cost Total Cost $840 $5,040 453477 850 4,250 860 3,440 870 6,090 $18,820 Problem 6-1A (Algo) Part 4 4. Using weighted-average cost, calculate ending inventory and cost of goods sold at October 31. (Round your intermediate calculations to 4 decimal places and final answers to 2 decimal places.) Ending inventory Cost of goods sold