Perez Corporation reported the following operating results for two consecutive years: Required a. Compute the percentage changes in Perez Corporation's income statement components between the two years. (Negative amounts should be indicated by a minus sign. Round your answers to 1 decimal place. (i.e.,.234 should be entered as 23.4).) PEREZ CORPORATION Income Statements 2018 2017 Percentage Chango % Sales Cost of goods sold Gross margin Operating expenses Income before taxes $ 1,300,000 $ 1,002,000 799,500 601,200 500,500 400,800 303,000 196,500 197,500 204,300 61,900 52,800 $ 135,600 $ 151,500 Income taxes Net income (loss) %