I'm looking at an SEM package that will track ROI. However, I have to develop the scripting to find the variable values of my sales! With Google Analytics they provide the scripting for "Total Sale" but how do I figure out what the scripting should be? I would think the SEM folks would know how to pull sales data from various engines. How else can they say they provide ROI calcs?
Anyway, if someone has any guidance on this I'd appreciate it very much as the SEM Customer Support folks have said "we don't know!"