How do I create a formula that continuously numbers my invoices?

  • Thread starter Thread starter Guest
  • Start date Start date
G

Guest

Hi,
I was wondering whether anyone knew how to do the following:
How do I create a formula that continuously numbers my invoices, e.g. 001
(first invoice) then when I go to type another invoice it numbers is 002.

PLEASE HELP!

Cheers
 
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