Jet Engine repeater field

Hello community,

I am using Jet Engine and a few other Crocoblock plugins with Bricks Builder.
I have created a CPT (custom post type) containing a repeater field embedding a couple of other fields. The one I am currently struggling with is a numeric field for which I would like the get the sum of all different values within each repeater.
Any idea about how to proceed ?

Warmest regards and thanks in advance for your kind assistance.
Jack (from France)