Where to start?

[Curious4]

I don't know how to start with this question. Anyone can offer help?

[novinosrin · Accepted solution]

data want;
 start='01jan2020'd;
 date='20dec2020'd;
 do i=start to date;
  if weekday(i)>1 then balance=ifn( weekday(i)=7,sum(balance,25),sum(balance,20));
 end;
 wday= weekday(date);
 keep 	date balance  wday;
 format date mmddyy10. balance dollar10.;
run;

proc print noobs;run;