Ollivanders uses a perpetual inventory system: Cost/Unit $60.00 Total Cost $60,000 No. Units 1,000 600 800 400 1,000 1,200 78.00 Beginning inventory May 2, sale May 7, purchase May 16, sale May 20, purchase May 30, sale 62,400 79.20 79,200 The cost of the 1,200 units sold on May 30 under the FIFO method is $94,080 $94,800 $86,400 $91,200 Addison, Inc. uses a perpetual inventory system. Information regarding one inventory item for the month of September follows: Sep. 1 20 units at $20 Inventory Sold 4 10 units 10 Purchased 30 units at $25 17 Sold 20 units 30 Purchased 10 units at $30 If Addison uses the weighted average cost method, what is the inventory balance at the end of September? a. $1,150.00 b. $1,187.50 c. $1,500.00 d. $1,375.00