CHECKBOXES action?

Hi @Darren_Murphy,
How does using an Inline List with Check List layout allow to define an action for when the checkbox is ticked or unticked?

I basically want to increment or decrement a value in a summary table when the user ticks or unticks the checkbox of a record but don’t see how I can do that :frowning:

Not sure if I am missing something obvious in my design/hack to try and achieve this?

Thank you