See attached..i started it but having trouble figuring out the rest. calculation please too.

Two or more items are omitted in each of the following tabulations of income statement data. Fill in the amounts that are missing. 2016 2017 2018 $ Sales revenue $291,870 $409,910 362494 Sales returns and allowances Net sales (11,800) Ending inventory 348,704 280070 Beginning inventory 18,010 Cost of goods sold Gross profit on sales 30,810 30810 Purchases Purchase returns and allowances Freight-in (13,790) (4,600) 8,780 260,010 299,009 (7,490) 8,800 (9,160) 11,060 (233,560) 46,510 (294,252) 82,370 88,080