Identifying duplicate lines using multiple values

Yes, so to get rid of the checking on, say, the amount value you'd remove the section in bold:

=IF(MAX(INDEX((G$1:G1=G2)*(D$1:D1=D2)*(P$1:P1=P2),0))>0,"Duplicate","")

Hi Andrew,

Sorry to be a pain. How can I amend the formula so that it identifies the original row and also the duplicated one?

Thanks,
Dan.