Sheryl:
Don't focus on numbering the report, because you'll never have a record of
where you left off for the last run if you number the reports at run time
for the latest run. Rather, assuming that you store in a table the invoice
data so that you have some record of what you billed and when you billed in
order to have an AR record (if you don't do that currently, think about
creating an invoices table and appending your invoice details to that table
and then basing your report on that table); it is much better number the
invoices as they are created in that table (you can use an auto number if
desired.)
