2019 2018 2017 2016 2015 Sales $ 512,623 $ 332,872 $ 260,056 $ 191,218 $ 142,700 Cost of goods sold 253,785 164,657 130,427 95,547 69,923 Accounts receivable 24,760 19,473 17,814 11,186 9,732 Compute trend percents for the above accounts, using 2015 as the base year.