There is a dataset, i want to know how to do some calculation with using REATAIN. New variable p_selling for 2014 to 2017, the predicted selling will be 10% more than the previous year.  New variable p_benifit for 2014 to 2017, the predicted benifit will be 5% more than the previous year.   DATA Sell;   INPUT Year Selling benifit;   DATALINES; 2013 50000 3000 2014 . . 2015 . . 2016 . . 2017 . . ; RUN; DATA Sell_2;   SET Sell;   /* ???????????? */ RUN;   ... View more