hi Michael,
there's not that much to go on in what you've given us to tell the truth. is that one single field that has those categories or are they all separate fields? how does one know if the customer is a potential repeat customer? is the customers evaluated just a count of all of the customers?
a) if those categories are in one field, then click on that category field, go to the Insert menu > choose Group and then the category field will be the default field for the group. then right click on the customer field and choose Insert > Summary and change the type to Distinct Count and the Summary Location to be on that new group.
b) if those are all different fields then you need to create a new formula for each summary you need. e.g. create a new formula named potentialrepeatcust with syntax like
if {your potential repeat customer field} > '' then 1
//assumes your potential repeat field is a text field
place your formula on the details section and then right click on it and choose Insert Summary keeping the defaults. then you'll need to create a formula for each of the other categories.
-jamie
