I have a model with 2 solid bodies. Below is the structure of my file.

1st. configuration contains union of the of 2 solid bodies

2nd. configuration contains Body 2

3rd. configuration contains Body 1

I want to be able to find the volume in each configuration and use these values in a drawing showing each configuration. I've tried assigning a variable for each configuration for the volume but the values keep changing.

What is the correct way of doing this?