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