Exercise $17-3($Algo$)$ Computing and analyzing trend percents LO P$1$

$20212020201920182017$

Sales $ $649,383$ $ $421,677$ $ $330,727$ $ $227,304$ $ $172,200$

Cost of goods sold $327,242212,589168,664115,05286,100$

Accounts receivable $31,56024,54222,62213,27511,830$

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.