Running total still adding suppressed data

In the section expert are under details i have this formula to suppress data and check box checked

{ICITEM.ITEMNO}=previous({ICITEM.ITEMNO}) and {OESHDT.TRANNUM}=previous({OESHDT.TRANNUM})

Formula created and place in report  header area

WhilePrintingRecords;

NumberVar SalesTotal =0;

Formula created and place in details area

WhilePrintingRecords;

NumberVar SalesTotal;

SalesTotal:=SalesTotal+{OESHDT.SAMTSALES}

Formula created and placed in report footer area

WhilePrintingRecords;

NumberVar SalesTotal;

Suppression seems to be working but running total still totals all data

Any ideas?