Western Windows constructs and installs windows for new homes. The sales staff are having a meeting and reviewing the following information to determine how to help reduce days' sales uncollected. Accounts receivable Net sales 2020 2019 2018 $ 605,250 $ 458,250 $382,000 6,834,000 5,913,000 5,140,000 Required: a. Calculate the days' sales uncollected for 2018 to 2020 and identify whether the trend is favourable or unfavourable. (Round the final answer to 2 decimal places. Do not round intermediate calculation. Use 365 days a year.) 2017 2016 2015 Days' sales uncollected days days days