Partial PO write-off for multiple receipts for a PO

Product Version : R12.1.3.

Hi Guru's

For PO line 1, we have 2 receipts vide receipt numbers 02A43648 & 02A43649

we are able to write off the complete PO balance amount of -63314.25,
however we want to write off only -42163.83(partial amount same as receipt 2)with receipt 02A43648,

    

Could you please let us know how to do the write-off for this scenario in Oracle R12.

Thanks,

Ram