Thank you a lot VKS, it worked

I have a question then: since this new column D is just a "temporary" field which is used only in the pivot table, I tried to do the same thing adding an "evaluated field" (sorry if that's not the correct translation, I mean the custom fields with formulas that you can add to a pivot table) with exactly the same formula (only with AMOUNT instead of C2); the new field works, but if I try to drop it in the "filter report label" of the pivot table, it cannot be dropped anywhere except in the "values" label. Am I doing something wrong? I thought that would have been a great idea...

Thank you again