Volume integration within .cube files

Hello,

I have a system with two layers which have charge transfer between them. I have calculated charge densities for each layer as well as the bilayer and have a .cube file of the charge density difference. I'd like to integrate this charge density over volumes encapsulating each layer to quantify how much charge has been transfered.

Is there a method within Materials Studio to calculated the "potential" enclosed within a volume? I know I could likely code something up from scratch, but I am looking to explore less onerous options first.

Thank you.