When I contact prospects I try communicate the potential to make more money from the same clients, but of course I can't tell specific numbers or ROI and this is frustrating me. I am designing now the sales process and would appreciate help from experienced fellows.
How would you approach this challenge?
(Of course don't forget to record the initial state before your gadget, whatever that is: drink/person, tip spent/hour, etc... so you can show a before/after state to your prospects)