Are these correct?

AAA Co. uses a periodic inventory system and has the following information in regard to its inventory Beginning inventory Purchase on January 25 Purchase on March 15 Purchase on October 2 Goods available for sale 200 units @ 15 300 units @ 16 200 units @17 400 units @ 18 $ 3,000 4,800 3,400 7.200 $18.400 There are 500 units in ending inventory. What is the amount of the ending inventory using the LIFO method? O $3,000 o $7,200 $7,800 O$8,900