Hola Carlos Andres Camacho Acuña,
Mira este video: Dashboard and Arcade - YouTube Gracias, Ben
If this answer was helpful please mark it as helpful. If this answer solved your question please mark it as the answer to help others who have the same question.
Hi Carlos,
Just to add onto Ben's post; I used Google translate for your question,
> Sum of fields in Dashboard in the list option ... In the Dashboard in the list option, can you take two fields and add the values? ... I have two different fields and I want to see them as a list, but adding their values
Yes, this is possible in the new ArcGIS Dashboards Beta. Please see this blog for more details
Getting started with Arcade in the ArcGIS Dashboards Beta
Hope this helps,