Produits Entr'ouvert » Calebasse

facturation: Change how invoicings and invoices are numbered.

• Invoicings for the CMPP must start with an offset depending
  on the last invoicing at software switching.

  INVOICING_OFFSET is used for this purpose.

• Invoices must start with the invoicing number. We allow 99999
  invoices per invoicing.

  eg. invoicing number 133, invoices from 13300001 to 13399999.