Vernon Corporation reported the following operating results for two consecutive years: Required a. Compute the percentage changes in Vernon Corporation's income statement components between the two years. (Negative amounts should be indicated by a minus sign. Round your percentage answers to 1 decimal place. (i.e., 0.234 should be entered as 23.4).) Sales $ 1,298,000 Cost of goods sold 798,270 Gross margin 499,730 Operating expenses 300,500 Income before taxes 199,230 Income taxes Net income (loss) $ 137,330