Sales Cost of goods sold 2021 $ 81,000 78,300 2020 $ 71,000 48,900 2019 $ 57,000 34,800 2018 $ 56,000 46,500 2017 $ 50,000 30,000 35 Dollar amounts stated are in thousands. a. Compute trend percentages for the above items taken from the financial statements of Lopez Plumbing over a five-year period. Treat 2017 as the base year. b. State whether the trends are favorable or unfavorable. Complete this question by entering your answers in the tabs below. Required A Required B Compute trend percentages for the above items taken from the financial statements of Lopez Plumbing over a five-year period. Treat 2017 as the bose year. (Round your answers to the nearest whole percent. le. 1.2345 as 123%) 2021 2020 2019 2018 2017 Sales Cost of goods sold % % % Required 8 >