Three question help with LIFO, weighted-average cost basis, and FIFO basis, thank you:

A company began an amounting period with 100 units of an item that cost $?.5 each. During the period It purchased 400 units of the item at $9 each and it sold 390 units. In the spaoes below glue the oasis assigned to the ending inventory and to goods sold under each of the three assumptions using periodic Inventory procedures. Ending Inventory Cost of Goods Sold The costs were assigned on a llFIIII basis The costs were assigned on a weighted-average cost basis Costs were assned on a FIFO basis LII' N' P