I can take a stab at this but you might need to tweak it as I cannot visualize your full set up.
Create a Running Total:
Name= 'Rep Online Count' (or whatever you want)
Field to Summarize=Order#
Type of SUmmary=DistinctCount
Evaluate=Use a formula ... then add your formula ...
{PRODDEFS.ISONLINEPRODUCT} = 1
Reset = On change of Group Pick Rep Group level here
Place it on the Group footer of the Rep grouping.
Does that do it?
Edited by DBlank - 22 Oct 2009 at 12:15pm