Sales Cost of goods sold 2021 $81,000 66,300 2020 $ 65,000 45,000 2019 $ 63,000 36,600 2018 $ 56,000 46,800 2017 $ 50,000 30,000 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 Treat 2017 as the base year. (Round your answers to the nearest whole percent. I.e. 1.2345 as 123%.) 2020 2017 2021 % % % Sales Cost of goods sold 2019 % % % 2018 % % sex % % Renuired