) the inventory on July 31. 00, PE 7-3A Perpetual Inventory using LIFO Beginning inventory, purchases, and sales for Item Gidget are as follows: Sept. 1 Inventory 80 units at $175 10 Sale 65 units 18 Purchase 75 units at $180 27 Sale 70 units Assuming a perpetual Inventory system and using the last-in, first-out (LIFO) method determine (a) the cost of merchandise sold on September 27 and (b) the inventory on September 30. 54 PE 7-4A Perpetual inventory using weighted average Beginning inventory, purchases, and sales for Meta-B1 are as follows: OBJ.3 July 1 12 23 26 Inventory Sale Purchase Sale 100 units at $400 70 units 120 units at $450 110 units Assuming a perpetual inventory system and using the weighted average method, deter mine (a) the weighted average unit cost after the July 23 purchase, (b) the cost of the merchandise sold on July 26, and @) the inventory on July 31