Formula column in report builder output

hi created customer report using report builder.
Output columns are Item, Qty, Rate from Exiting doc type. It is working fine. I would like to add one more column next to Rate as Amount. It should multiply Qty * Rate.
how can i do that.
thank you.

I hope it an either be done by script report or query report. As much I know it is not possible in report created through Report Builder.

But, if there is any way to do it in this type of report then I also want to know how to do it.

Ruchin Sharma

Did you find how to do it? I would like to do the same but instead to create a percentage.

Thank you!