EE 7-4 330 OBJ. 3 PE 7-4A Perpetual inventory using weighted average Beginning inventory, purchases, and sales for 30xT are as follows: May 1 Inventory 50 units at $80 12 Sale 35 units 23 Purchase 60 units at $90 26 Sale 55 units Assuming a perpetual inventory system and using the weighted average method, deter- mine (a) the weighted average unit cost after the May 23 purchase, (b) the cost of the merchandise sold on May 26, and (c) the inventory on May 31. EE 7-4 p 330 OBJ. 3 PE 7-4B Perpetual inventory using weighted average 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 Assuming a perpetual inventory system and using the weighted average method, deter- mine (a) the weighted average unit cost after the October 22 purchase, (b) the cost of the merchandise sold on October 29, and (c) the inventory on October 31