Don Williams received a memo requesting that he complete a trend analysis of the following numbers using 2018 as the base year. Sales Gross profit Net income 2021 $470,000 310,000 83,000 2020 $530,000 370,000 103,000 2019 $550,000 470,000 53,000 2018 $630,000 530,000 63,000 Could you help Don with the request? (Round your answers to the nearest whole percent.) 2021 2020 2019 Sales % % % Gross profit Net income % % % 2018 100 % 100 % 100% % % %