I appreciate the prompt reply!  My issue is that I need to include, in a single invoice, selected items from MORE THAN ONE estimate.  Many times, projects will have multiple estimates due to different scopes of work and/or subcontractors performing the work.  But the client does not want to receive, nor do I want to record, two or more invoices in a given month. In one invoice, I want to be able to include specific lines from each of the two or three estimates involved.  And, of course, I need for the applicable entries in the estimates to show the amount billed in the progress invoice, just as it would if only a single estimate were involved.  I hope you have suggestion(s) for me!