answer both a and b please! thank u!!

Drift, Inc. 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 400 units @ $15 600 units @ $16 400 units @ $17 800 units @ $18 6,000 9,600 6,800 14,400 $ 36,800 There are 1,000 units in ending inventory What is the amount of the ending inventory using the LIFO method?! $14400 $15,600 $17,800 56,000 If the ending inventory balance is overstated, what impact will this have on the company's income statement? Cost of Goods Sold is overstated and Net Income is overstated. Cost of Goods Sold is understated and Net Income is overstated, O Cost of Goods Sold is understated and Net Income is understated. Cost of Goods Sold is overstated and Net Income is understated