Common-size and trend percents for Rustynail Company's sales, cost of goods sold, and expenses follow Common-Size Percents 2016 100.0% 100.0% 100.0% 61.2 13.7 Trend Percents 2016 104.0% 102.8% 100.0% 114.1 108.8 100.0 105.5 100.6 100.0 2017 2015 2017 2015 Sales Cost of goods sold Operating expenses 63.4 14.2 57.8 14.0 Determine the net income for the following years. (Enter all amounts as positive values.) 2017 2016 2015 Sales Cost of Goods Sold Operating Expenses Net Income $100,000 57,800 14,000 28,200 Did the net income increase, decrease, or remain unchanged in this three-year period