Zero dollar PPR is netting of Credit memo and standard invoices and left excess Credit memo balance

Summary:

We have User-validation placed for Zero Dollar in Manage Formats where if amount is 0 then it will come up in particular PPR
But Zero dollar PPR is netting of Credit memo and standard invoices and is leaving excess Credit memo balance
We just want to pick those invoices only where standard and CM net balance comes up to 0

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