Hello Richard,
Thank you for the very instructive lesson. I have a problem. My actual invoices (i.e., the copied orders need to have sequential numbering. For example, if I issue quotations 1,2,3,4,5,6 and in future time, I close some of some of these sale proposals, lets say for the quotations 1, 3 and 6, these orders/invoices have to be numbered sequentially (forming also a separate invoice list). Can you give me a quick solution, of where to look in your courses?  Best, Despina.