Can someone help me with part B?

The inventory records of Kuffel Co. reflected the following information for the year ended December 31, 2019: Number of Units 150 Unit Cost $ 33 34 Total Cost $ 4,950 2,380 70 Date 1/1 1/24 2/22 3/7 4/10 6/11 9/28 12/4 Transaction Beginning inventory Purchase Sale Purchase Purchase Sale Purchase Sale 39 36 3,510 5,040 (100) 90 140 (100) 50 (100) 37 1,850 Required: a. Assume that Kuffel Co. uses a periodic inventory system. Calculate cost of goods sold and ending inventory under FIFO and LIFO. Answer is complete and correct. Cost of goods sold Ending inventory $ $ FIFO 10,450 7,280 $ $ LIFO 11,080 6,650 b. Assume that Kuffel Co. uses a perpetual inventory system. Calculate cost of goods sold and ending inventory under FIFO and LIFO. Answer is not complete. LIFO FIFO 10,450 $ Cost of goods sold Ending inventory 7,080