common-size and trend percentages for a companys net sales, cost of goods sold, and expenses follow: Common-Size Percentages Trend Percentages 2023 2022 2021 2023 2022 2021 Net sales 100.0 % 100.0 % 100.0 % 108.6 % 107.1 % 100.0 % Cost of goods sold 66.7 63.6 60.7 116.7 111.4 100.0 Expenses 18.9 16.6 18.6 111.1 104.5 100.0 Required: a. Calculate the profit percentage for 2021, 2022 and 2023. (Round the final answers to 2 decimal places.)