ferpetual inventory using weighted average Beginning irventery, purchases, and sales for wes 12 are as follows: 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. 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. 6. Assuming a perpetuat inventory system and ysing the weighted average method, determine the inventery on October 31 . Round your "average unit cost" to two decimal olaces