BADI or USER-EXIT for setting final invoice indicator in transaction MIRO

Hello,

I need to set the final invoice indicator in transaction MIRO. I am using BADI "MRM_FINAL_INVOICE_IND". This BADI has a restriction when partial invoices are posted.

Example.

PO has 150 EA

Invoice1 - posted for 100 EA

Invoice2 - posted for 50 EA

While posting invoice2 final invoice indicator should be flagged.

Please let me know how these can be achieved with the above BADI or suggest some user-exits.

Thanks in advance.