73) Lauer Corporation uses the periodic inventory system and has provided the following information about one of its laptop computers: Date | Transaction 1/1 Number of Units 100 5/5 Purchase 200 Cost per Unit $800 $900 $1,000 $1,100 8/10 Purchase 300 10/15 Purchase 200 During the year, Lauer sold 750 laptop computers. What was ending inventory using the LIFO cost flow assumption? A) $45,000. B) $60,000. C) $40,000. D) $55,000