Print Item Perpetual Inventory Using Weighted Average Beginning inventory, purchases, and sales for Meta-B1 are as follows July 1 Inventory 12 Sale 23 Purchase 26 Sale 100 units at $400 70 units 120 units at $450 110 units a. Assuming a perpetual inventory system and using the weighted average method, determine the weighted average unit cost after the July 23 purchase a perpetual inventory system and using the weighted average method, determine the cost of the merchandise sold on July 26 system and using the weighted average method, determine the inventory on July 31