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Perpetual Inventory Using Weighted Average Beginning inventory, purchases, and sales for WCS12 are as follows: Oct. 1 Inventory 13 Sale 22 Purchase 29 300 units at $13 170 units 370 units at $15 a. Assuming a perpetual inventary system and using the weighted average niethod, determine the weighted average unit cost after the October 22 purchase. Round your answer to two decimal places 14.48 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 cast to two decimat places 4,344 Assuming a perpetual inventory system and using the weighted average method, determine the inventory on October 31. Round your "average into two deal places 400 X