How do I add a serial number to an invoice

[Guest]

I am using an Excel based invoice and I want to add a serial number that will
automatically update each time I open a new invoice. Is there an easy way?
Thanks

 

[Bob Phillips]

See http://www.mcgimpsey.com/excel/udfs/sequentialnums.html

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HTH

Bob Phillips

(replace somewhere in email address with gmail if mailing direct)