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% 61.4 13.9 Trend Percents 2016 105.1% 103.9% 100.0% 119.2 113.7100.0 106.7 101.7100.0 2017 2015 2017 2015 Sales Cost of goods sold Total expenses 63.6 14.4 56.1 14.2 Determine the net income for the following years. (Enter all amounts as positive values.) 2017 2016 2015 Sales Cost of Goods Sold Total Expenses Net Income $ 100,000 56,100 14,200 29,700 Did the net income increase, decrease, or remain unchanged in this three-year period? Remained unchanged Net income increased Net income decreased