Calculated item in report

Good morning, everyone s.
I'm doing a report from a query, this report have a calculated field (Calc_Cantidad) where I accumulating field quantity, so far without problem, it comes when I just want to accumulate those records that meet the condition 'tipo_art = true'.
Can we define this in the properties of the field calculated or report or somewhere else without writing a single line of code?
Regards

Message forwarded from pcsoft.us.windev

Hi Javier,

Create an invisible calculated control that is tipo_art * quantity and create a sum on that control.

Best regards,
Piet