Perpetual inventory using weighted average Beginning imventory, purchasei, and sales for WCS12 are as follows: a. Assuming a perpetual inventory system and using the welghted average method, determine the welghted average unit cost after the October 22 purchase. Round vour answer to two decimal places. per unit b. Assuming a perpetual inventory system and using the weighted average method, determine the cost of goods sold on October 29 , Round your "average unit cost" to two decimal places. C. Assuming a perpetual inventory system and using the weighted average method, determine the inventory on October 31 . Reund your "average unit cost" to two decimal places. Inventory turnover and number of days' sales in inventory Financial statement data for years ending December 31 for Tango Company follow: a. Determine the inventory turnover for 20Y7 and 20Y6. Round your answers to one decimal place. b. Determine the days' sales in inventory for 207 and 20Y6. Use 365 days a year. Round your answers to one decimal place. c. Are the changes in inventory tumover and the number of days' sales in inventory from 20 Y 6 to 20 y 7 favorable or unfavorable