please help

XYZ Company's records contained the following data for the month ended 3/31/21: Units $ per unit Beginning in 250 20.00 Purchase 1 650 21.00 Sales 750 50.00 Purchase 2 650 22.00 Sales 700 50.00 Purchase 3 700 23.00 Sales 600 50.00 Compute ending inventory and prepare partial income statements through gross margin for XYZ Company using the FIFO, UFO, and average inventory costing methods, first for a periodic and then for a perpetual inventory system Prepare the partial income statements using the FIFO, LIFO, and average inventory costing methods for a perpetual inventory system Why is the gross profit different? Which method should be used in the financial statements