Beginning inventory, purchases, and sales for WCS12 are as follows: 300 units at $12 150 units 350 units at $15 Oct. 1 13 22 29 Inventory Sale Purchase Sale 400 units a. Assuming a perpetual inventory system and using the weighted average method, determine the weighted average unit cost after the October 22 purchase. Round you answer to two decimal places. per unit Accounting numeric field b. Assuminya perpetuar miyy 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. Round your "average unit cost" to two decimal places.