Beginning inventory, purchases, and sales for wcs12 are as follows: oct. 1 inventory 300 units at $8 13 sale 175 units 22 purchase 375 units at $10 29 sale 280 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. $ per unit b. assuming a perpetual inventory system and using the weighted average method, determine the cost of the merchandise 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, determine the inventory on october 31. round your "average unit cost" to two decimal places. $ feedback