How are the correct numbers calculated?

Required information The following information applies to the questions displayed below. Selected comparative financial statements of Korbin Company follow: KORBIN COMPANY Comparative Income Statements For Years Ended December 31, 2017, 2016, and 2015 2017 2016 2015 Sales Cost of goods sold Gross profit Selling expenses Administrative expenses Total expenses Income before taxes Income taxes Net income S 440,342 337,338 $ 234,100 149,824 84,276 30,901 19,430 50,331 33,945 6,891 $ 59,500 39,422 $ 27,054 265,086 211,511 125,827 46,553 29,686 76,239 49,588 10,166 175,256 62,529 39,631 102,160:23 73,096 13,596 KORBIN COMPANY Comparative Balance Sheets December 31, 2017, 2016, and 2015 2017 2016 2015 Assets Current assets Long-term investments Plant assets, net Total assets Liabilities and Equity Current liabilities Common stock Other paid-in capital Retained earnings Total liabilities and equity S 53,155 41,588 55,593 3,100 62,280 S 150,369 146,014 $ 120,973 1,100 103,326 2:20 97,214 $ 21,954 21,756 $ 21,170 50,000 5,556 44,247 S 150,369 146,014 $ 120,973 68,000 8,500 51,915 68,000 8,500 47,758 2. Complete the below table to calculate income statement data in common-size percents. (Round your percentage answers to 2 decimal places.) KORBIN COMPANY Common-Size Comparative Income Statements For Years Ended December 31, 2017, 2016, and 2015 2017 2016 2015 100.00196 100.00196 100.001% Sales Cost of goods sold Gross profit Selling expenses Administrative expenses Total expenses Income before taxes Income taxes Net income 60.20--001 39.80-0.01 14.20-01 9.00-001 23.20o 16.60-001 3.09-001 62.70-001 37.30-o 13.80-001 8.80--001 22.60-001 14.70--0.01 3.01-1001 64.00-001 36.00-0.01 13.20-00 8.30--001 21.50-L001 14.50-001 2.94-001 13.51-201196 11.69-.0.01% 11.56-400196 3. Complete the below table to calculate the balance sheet data in trend percents with 2015 as the base year. (Round your percentage answers to 2 decimal places.) KORBIN COMPANY Balance Sheet Data in Trend Percents December 31, 2017, 2016 and 2015 2017 2016 2015 Assets Current assets Long-term investments Plant assets, net Total assets Liabilities and Equity Current liabilities Common stock Other paid-in capital Retained earnings Total liabilities and equity 74.81-0.1 35.48-40.1 165.91-0. 120.70- 95.62-40.1 100.00-0.1 | % 100.00-0.1 100.00-0.1 100.00-0.1 | % 156.09-o. 124.30-o. 103.70-0. 136.00-0. 152.99-0. 117.33-0.1 124.30-o. 102.77-0. 136.00-0.1 152.99-. 107.94-0 120.70-o. 100.00-0.1 | % 100.00-0.1 100.00-0.1 100.00-0.1 100.00-4. 1 %