NEED help with the two wrong ones! With explanations please !!! Thank you!!!!

Return to question 9 Enter the missing dollar amounts for the income statement for each of the following independent cases. (Hint: In Case B, work from the bottom up.) 8 points X Answer is complete but not entirely correct. Case A Case B Case C $ 7,510 $ 5,740 $ 6,020 $ 6,570 $ 3,880 9,410 8,670 Net sales revenue Beginning inventory Purchases Goods available for sale Ending inventory Cost of goods sold Gross profit Expenses Pretax income (loss) $ 11,160 4,960 16,120 10,330 15,240 13,290 9,010 X 10,960 5,790 4,280 4,350 1,670 1,720 400 1,460 1,010 (450) 500 $ 1,320 $ $ 1,170