Hi
You should look in the calculate event of the subforms SubformFour and SubformFourTwo, you don't need the code in the click event of add button or exit of grade level.
What you will need to do is make the changes to look at the General Music script object and change the other ones to match, which is to pass in the subform they are working on, so the code can be reused on the subsequent subforms.
Regards
Bruce