The following represents the inventory of Rajan Company for the month of April:

6 The following represents the inventory of Rajan Company for the month of April Api 1 Beginning Inventory 100 units $8 12 Sales April 3Purchases April 10 Sales April 21 Purchases April 28 Sales 50 units 300 units 250 units 400 units 200 units $12 $16 Assuming a periodic inventory system is used by Rajan Company, what is ending inventory under LIFO? a. b. Assuming a periodic inventory system is used by Raian Company, what is cost of goods sold under c. Assuming a periodic inventory system is used by Rajan Company, what is ending inventory under d. What is the gross margin for a and b and c above? FIFO? the Weighted-Average Cost method