SO--DELI-PGI--Proforma Invoice--No Accounting Doc?

Question

Hi All,
We've a scenario wherein, we're combining some normal deliveries and return deliveries into a 'collective invoice' and in some cases, the net value of the billing document is ZERO.
And when the net value is ZERO, we want to create a proforma equivalent document( ZF8).
And all these SOs are delivery relevant and PGI is carried out for these deliveries, and when proforma( ZF8) is being created> should we create the accounting document? The point of discussion is that since GI/ GR has happenedaccouting document needs to be created to close the COGS .. hence my question is should the invoice be created or can we leave it open?
Regards,
Raghu

Answer 1

should we create the accounting document? The point of discussion is
  that since GI/ GR has happened--accouting document needs to be
     created to close the COGS
I feel, you are not much familiar with SD process.  Creation of billing document is not  related to COGS.  Once you do PGI, automatically in the background, system will generate a material / accounting document and the impact will be
a)  your COGS account will get debited and
b)  Inventory account will get credited
Even if you generate a commercial invoice, it wont have any impact on the above.  For information, once you generate a commercial billing document, following would be your accounting entries
a)  Debit customer account  and
b)  Credit sales account
Here G/L Account for COGS and  sales account will be different
thanks
G. Lakshmipathi