XT Inc. had the 20 units of inventory purchased at $400 each on January 1 , 2019. During March of 2019 the company purchased 300 units of inventory at $420 each, and in June it purchased 500 units at $450 each. In April it sold 320 units for $500, and in September it sold 480 units for $500. What is its LIFO ending inventory, assuming they apply LIFO on a periodic basis? 9000 None of these answers is correct. $8000 10000