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 average unit cost after the answer to two decimal places. X per unit b. Assuming a perpetual inventory system and using the weighted average method, determine the cost of goods sold on October 29 . Re two decimal places. x c. Assuming a perpetual inventory system and using the weighted average method, determine the inventory on October 31 . Round you decimal places. x