2021 2020 2019 2018 2017 Sales $ 599,517 $ 397,031 $ 317,625 $ 233,548 $ 175,600 Cost of goods sold 308,304 203,986 165,289 120,909 89,556 Accounts receivable 29,017 23,226 21,694 13,639 12,029 Compute trend percents for the above accounts, using 2017 as the base year. For each of the three accounts, state whether the situation as revealed by the trend percents appears to be favorable or unfavorable