Correct syntax for adding multiple statements

[Hacim]

This formula excludes weekends and holidays from the count of days a work order is open, from {requestdate} to {completiondate} but!
If the work order 'requestdate' falls on a weekend or holiday, I need to use {completiondate - {requestdate} and count the day the work order was requested.
How do you add multiple statements or criteria to this formula? The statements I tried only looked at the last statement.
Also tried If and Then statement which did not work.

DateVar Start := {WO.REQUESTDATE} ;
DateVar End := {WO.COMPLETIONDATE};
NumberVar Weeks;
NumberVar Days;
NumberVar Hol:= 0;
Weeks:= (Truncate (End - dayofweek(End) + 1 - (Start - dayofWeek(Start) +1))/7)*5;
Days:=dayofweek(End)-DayofWeek(Start)+1
+(if Dayofweek(Start) =1 then-1 else 0)
+(if DayofWeek(End)=7 then-1 else 0);
if Date(2002,01,01)in start to end then Hol:=Hol+1 else Hol:= Hol;
if Date(2002,01,18)in start to end then Hol:=Hol+1 else Hol:= Hol;
if Date(2002,01,21)in start to end then Hol:=Hol+1 else Hol:= Hol;
if Date(2002,02,18)in start to end then Hol:=Hol+1 else Hol:= Hol;
if Date(2002,05,27)in start to end then Hol:=Hol+1 else Hol:= Hol;
if Date(2002,07,04)in start to end then Hol:=Hol+1 else Hol:= Hol;
if Date(2002,07,05)in start to end then Hol:=Hol+1 else Hol:= Hol;
if Date(2002,09,02)in start to end then Hol:=Hol+1 else Hol:= Hol;
if Date(2002,10,14)in start to end then Hol:=Hol+1 else Hol:= Hol;
if Date(2002,11,28)in start to end then Hol:=Hol+1 else Hol:= Hol;
if Date(2002,11,29)in start to end then Hol:=Hol+1 else Hol:= Hol;
if Date(2002,12,24)in start to end then Hol:=Hol+1 else Hol:= Hol;
if Date(2002,12,25)in start to end then Hol:=Hol+1 else Hol:= Hol;
Weeks + Days - Hol