How to print a subtotal base on per page (Crystal Report)

lets say i have 3 pages in crystal report there should be a subtotal per page

You need to use three formulas ;
Formula 1 : @Reset

Code:

NumberVar x;
WhilePrintingRecords;
x:=0;

 

 Formula 2 : @Sum

Code:

NumberVar x;
WhilePrintingRecords;
x:=x+{DatabaseField};

 

Formula 3 : @Display

Code:

NumberVar x;
WhilePrintingRecords;
x

Place Formula1 in Page Header section and suppress
Place Formula2 in Details section and suppress
Place Formula3 in Page Footer and don't suppress, this is your subtotal

 

Note :
For Duplicates Records :

NumberVar x;
WhilePrintingRecords;
IF OnFirstRecord= true Then
x:= {Databasefield}
Else

if {DatabasefieldKey} <> previous( Databasefieldkey) Then
x:=x+{Databasefield}
ELSe
x:=x ;