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 mathos, determine the weighted average unit cost after the October 22 purehase. Round your answer to two decimal places. x per unit b. Assuming a perpetual inventory system and using the weighted average method, determine the cost of foods 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, detprmine the inventory on October 31 . Round your "average unit cost" to two decimat places