QtyCompleted for Job in Crystal

Does anyone have a good scheme for getting the QtyCompleted linked to
Job Assemblies in a Crystal Report?

I understand the number comes from the JobOper associated with the
final operation but not sure on getting the logic to stack up into a
Crystal report. Usually, I would do some a couple of compound queries
in Access (sum up final operation qty in one query, link to another
query with Assemblies). I've been trying to avoid some of these
outside databases and working directly with just Vantage and Crystal.
I'm currently on V8.00 so no option for BAQ reports.

Any Crystal experts know of a good way to manage this?