Adding up numbers column in kanban board list

Hi

The current kanban view shows the count of items in that list. But I want it to show the Sum of custom field of type number there.

Idea is that I want to use it to progress on my sales pipeline and adding up expected revenue will be very useful

This can also be used to get an idea on total number of hours allocated to tasks in a list ( but adding hours estimated of all tasks in that list )

Is that currently possible or a small change that you can add in near future?