Common-size and trend percentages for a company's net sales, cost of goods sold, and expens Common-Size Percentages Trend Percentages 2020 2019 2018 2020 2019 2018 Net sales 100.0% 100.0% 100.0% 108.1% 106.5% 100.0% Cost of goods sold 60.9 59.2 55.4 116.2 112.2 100.0 Expenses 35.3 31.9 33.5 112.1 105.0 100.0 Required: a. Calculate the profit percentage for 2018, 2019 and 2020. (Round the final answers to 2 dec places.) Profit Percentage 2018 2019