proc sort data=ctg.nestle_promos out=ctg.nestle_promos_sorted;
  by province_name type brand Date;
run;

proc hpfengine data = ctg.nestle_promos_sorted outfor=forecasts;
id date interval=month accumulate=total notsorted;  
 by province_name type brand;
forecast Net_Revenue;
run;
  
proc print data=forecasts(obs=20);
run;