What approach would you use to implement some form of Manufacturer Rebates in Compiere.  This is the situationj where the Vendor provides some form a rebate on goods purchased via a PO (contingent on sell through to customers).

I would assume from a purely financial point of view you could make Financial Adsjustments, but I would prefer a transactional process.  Could we leverage Vendor RMA's somehow (zero quantity, but >0 value).  Or would you just invoice the Vendor?  

Ideas???