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Perpetual inventory using welghted average Beginning inventory, purchases, and sales for wCS12.are as follows: a. Assuming a perpetual inventory system and using the weighted average inethod, 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 mathod, determine the cost of goods sold on October 29 . Round your "average unit cost" to two decimal places. 1 c. Assuming a perpetual inventory system and ising the weighted averoge method, determine the inventory on October 31 , Round your "average unit coat" to two decimal places. 1