The inventory records of Kuffel Co. reflected the following information for the year ended December 31, 2019: Date Transaction Number of Units Unit Cost Total Cost 1/1 Beginning inventory 150 $ 33 $ 4,950 1/24 Purchase 70 33 2,310 2/22 Sale (100 ) - - 3/7 Purchase 90 36 3,240 4/10 Purchase 140 39 5,460 6/11 Sale (100 ) - - 9/28 Purchase 50 37 1,850 12/4 Sale (100 ) - - Required: a. Assume that Kuffel Co. uses a periodic inventory system. Calculate cost of goods sold and ending inventory under FIFO and LIFO. b. Assume that Kuffel Co. uses a perpetual inventory system. Calculate cost of goods sold and ending inventory under FIFO and LIFO. c. LIFO results are different for parts a and b as timing of the application of LIFO rules is relevant.