Hi,
Result
SUMCT <Operand>
Delivers the result of the operand in all rows or columns (see
Percentage Functions %CT).
Overall Result
SUMGT<Operand>
Delivers the overall result of the operand (see Percentage Functions
%GT).
Report Result
SUMRT<Operand>
Delivers the report result of the operand (to distinguish between the
overall and the report result, see also Percentage Functions %GT and
%RT)
please find the below link.
http://help.sap.com/saphelp_nw70/helpdata/EN/03/17f13a2f160f28e10000000a114084/content.htm
Problems with the SUMGT and SUMRT or %GT and %RT operators
Thanks,
Phani.