Please explain, thanks!

Use the following to answer questions 32 and 33: Carrington Company has a perpetual inventory system and uses the LIFO method of inventory costing. Carrington reported the following events during the month of March: Date Mar. 1 Number of Units Bought Sold 100 Unit Price $10 $11 75 50 10 Event Beginning Inv. Purchase Sale Purchase Sale Sale Purchase Sale 140 $12 16 110 21 70 175 $14 30 120 32. The cost of goods sold for the March 21st sale is: A) $700 B) $720 C) $785 D) $ 840 33. The ending inventory on March 31st is: A) $1,440 B) $1,620 C) $1,640 D) $1,960