Perpetual Inventory Using Weighted Average Beginning inventory, purchases, and sales for WCS12 are as follows: a Assuming a perpetual Inventory system and using the weighted average method, determine the weighted overage unit cost after the October 22 purchase. $ per unit b. Assuming a perpetual Inventory system and using the weighted average method, determine the cost of the merchandise 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. Round your "average unit cost* to two decimal places. $