Sales Cost of goods sold Accounts receivable 2021 2020 $ 654,911 316,857 31,829 $ 436,607 211,271 25,498 2019 $ 339,772 166,241 23,308 2018 $ 233,520 114,040 13,684 2017 $ 168,000 80,640 11,491 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