Archive Invoices

	Completed invoices are those that have been shipped, ignoring
	whether printed or posted to the G/L.

	Quotes (if selected) are copied regardless, since they are never
	shipped.

	Copied (archived) invoices ARE NOT removed from the Current Files.
	Use O/E File Purging to remove invoices based on a cutoff date. 
	Normally you would archive before purging the current files, because
	with GREUX an invoice will NOT purge unless it has been archived. 

	If in doubt as to whether this archive process has been done
	or not, ARCHIVING AGAIN does no harm, since any invoices already
	in the history file are skipped anyway. So feel free to archive
	again to be sure.