Can someone help and explain this please. I dont even really understand how I got the first part right.

Inventory information for Part 311 of Sheridan Corp. discloses the following information for the month of June. Sold 301 units @ $12 June 10 Balance June 1 197 units @ $29 15 Sold 500 units @ $30 11 Purchased 803 units @ $14 27 Sold 297 units @ $32 20 502 units @ $16 Purchased Your answer is correct. Assuming that the periodic inventory method is used, compute the cost of goods sold and ending inventory under (1) LIFO and (2) FIFO. (1) LIFO (2) FIFO $ 14920 $ 13314 Cost of Goods Sold $ $ Ending Inventory 7966 9572 eTextbook and Media Your answer is incorrect. Assuming that the perpetual inventory method is used and costs are computed at the time of each withdrawal, what is the value of the ending inventory at LIFO? The ending inventory at LIFO Assuming that the perpetual inventory method is used and costs are computed at the time of each withdrawal, what is the value of the ending inventory at LIFO? $ The ending inventory at LIFO eTextbook and Media Your answer is incorrect. Assuming that the perpetual inventory method is used and costs are computed at the time of each withdrawal, what is the gross profit if the inventory is valued at FIFO? Gross Profit (FIFO) $ JI