Perpetual Inventory Using Weighted Average Beginning inventory, purchases, and sales for H76 are as follows: a. Assuming a perpetual inventory system and using the weighted average method, determine the weighted average unit cost after the July 23 purchase. per unit b. Assuming a perpetual inventory system and using the weighted average method, determine the cost of the merchandise sold on July 26. c. Assuming a perpetual inventory system and using the weighted average method, determine the inventory on July 31 . Feedback Check My Work When the weighted average cost method is used in a perpetual inventory system, an averago unif cost for each itom is computed each time a purchase is made. This unit cost is used to determine the cost of each thale unti another purchase is made and a new average is computed