Sales Cost of goods sold 2021 $ 78,000 65,700 2020 $ 68,000 54,300 2019 $ 60,000 41,700 2018 $ 55,000 43,800 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. Answer is complete but not entirely correct. 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 base year. (Round your answers to the nearest whole percent. i.e. 1.2345 as 123%.)