pls help!what's wrong with my program?
program j;

{$APPTYPE CONSOLE}

uses
  SysUtils;
var i,n,n1,n2,n3,c1,c2,t,t1,t2,sum:longint;
s:string;
//a:array [1..1001] of longint;
begin
 read(n1,c1);
 read(n2,t,c2);
 read(n3);
 readln(n);
 sum:=0;
 for i:=1 to n do
  begin
   readln(s);
   t1:=strtoint(copy(s,1,2));
   t2:=strtoint(copy(s,4,2));
   if (t1=0) and (t2<6) then sum:=sum+0 else
     if (t2>0) then sum:=sum+t1+1 else sum:=sum+t1;
  end;
 writeln('Basic:     ',n1+c1*sum);
 if sum<=t then writeln('Combined:  ',n2) else writeln('Combined:  ',n2+(sum-t)*c2);
 write('Unlimited: ',n3);
end.

!!!!!!!!!!!!!!!!!!!!!
if (t1=0) and (t2<=6) then sum:=sum+0 else
!!!!!!!!!!!!!!!!!!!!!