need help solving this please

- Cell A17: Use CONCAT to enter the text LIFO Inventory Balance: (with colon). (PG-4a) - Cell B17: Enter a formula that calculates the ending inventory balance under LIFO. (PG-4b) Row 18: - Cell A18: Use CONCAT to enter the text FIFO Inventory Balance: (with colon). (PG-4c) - Cell B18: Enter a formula that calculates the ending inventory balance under FIFO. (PG-4c) Row 19: - Cell A19: Use CONCAT to enter the text WA Inventory Balance: (with colon). (PG-4d) - Cell B19: Enter a formula that calculates the ending inventory balance under the weighted average method. (PG-4d)