Perpetual Inventory Using Weighted Average Beginning inventory, purchases, and sales for WCS12 are as follows: Oct. 1 Inventory 340 units at $15 13 Sale 160 units 22 Purchase 320 units at $18 29 Sale 300 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 your answer to two decimal places. $fill in the blank 1per 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. $fill in the blank 2 c. Assuming a perpetual inventory system and using the weighted average method, determine the