2017 2016 2015 2014 2013 Sales $ 282,880 $ 270,800 $ 252,600 $ 234,560 $ 150,000 Cost of goods sold 128,200 122,080 115,280 106,440 67,000 Accounts receivable 18,100 17,300 16,400 15,200 9,000 Compute trend percents for the above accounts, using 2013 as the base year.