Perpetual inventory using weighted average Beginning inventory, purchases, and sales for WCS12 are as follows: Date Line Item Description Value Oct. 1 Inventory 340 units at $15 Oct. 13 Sale 160 units Oct. 22 Purchase 320 units at $16 Oct. 29 Sale 400 units a. Assuming a perpetual inventory system and using the weighted average method, determine the weighted average unit cost after the October 22 purchase. Round your answer to two decimal places. fill in the blank 1 of 1$ 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 cost" to two decimal places. fill in the blank 1 of 1$ c. Assuming