Quote Vs. Booked Sales Report

I am trying to write a crystal report to compare quotes vs. booked
sales. I would like to be able to filter by rep in a specific date
range. I have the report almost completed. Problem is if a rep
doesn't have any quote or booked sales I would still like them to show
on the report with $0 dollars. When I left outjoin I get an error.
Has anyone created a report similar to this, or have any suggestions?
I have been working on this for a month and need to finally get it
right. Thanks in Advance, Jen