Using the following information from the inventory records of Robinson Co. answer questions 19-21: Beginning Inventory March 1 50 units @ $5.00 cost per unit. Purchases: N First Purchase: March 7 200 units @ $5.10 cost per unit Second Purchase: March 500 units @ $5.40 cost per unit. 19 Third Purchase: March 22 300 units @ $5.50 cost per unit. Sales SALES on March 31 800 units @ $8.00 selling price per unit L SALES on March 31 800 units @ $8.00 selling price per unit. 19. Determine the amount of cost of goods sold assuming the LIFO cost flow method. $4,220 O $4,400 $4.310 $4,350 D Question 20 2.5 pts Using the information provided in Question 19, determine the amount of ending inventory assuming the FIFO cost flow method. $ 1.270 7 O $ 1.100 $ 1,375 O $ 1.250 > Question 21 2.5 pts Using the information provided by Question 19, determine the amount of gross margin assuming the FIFO cost flow method. O $2,155 O $2,000 $2.400 $2.130