Help needed please

Beginning inventory Purchases Sales 1,000 units at $5 9,000 units at $7 9,500 units at $10 * Your answer is incorrect. Determine cost of goods sold during the period under a periodic inventory system using the FIFO method. (Round answer too decimal places, eg. 1,250.) FIFO Cost of goods sold during the period $ 64000 eTextbook and Media * Your answer is incorrect. Determine cost of goods sold during the period under a periodic inventory system using the LIFO method. (Round answer to O decimal places, eg. 1,250.) LIFO Cost of goods sold during the period $ 75500 eTextbook and Media * Your answer is incorrect. Determine cost of goods sold during the period under a periodic inventory system using the average-cost method. (Round average-cost per unit to 3 decimal places, eg. 12.502 and final answer to decimal places, e.g. 1,250.) Average-cost Cost of goods sold during the period $ 6.8