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 $289,670 $ $407,680 Sales returns and allowances (10,290) (13,520) Net sales 348,765 Beginning inventory 18,680 32,650 Ending inventory Purchases 261,500 299,847 Purchase returns and allowances (4,750) (8,480) (9,460) Freight-in 7,350 9,610 12,490 Cost of goods sold (236,980) (293,412) Gross profit on sales 42,400 83,690 97,250