I want to have a series of checkboxes in a document that then change a value in a table when clicked.

This is for a grading rubric. So, let's say the table value begins at 100.

I want to be able to click checkboxes for specific skills missed and then have a point deducted from the total. Does this make sense?

I am able to do this in Excel using macros, but I can't seem to figure it out in word. Help!

Thanks.