Hello

I'm developing a form that allows students to choose university module choices. I have a credit counter which keeps a running total of all selected modules credits. A module cannot be selected if it exceeds the credit limit for each semester.

One module is 'Management Dissertation' which is either worth 10 credits in semester 1 and 20 credits in semester 2 OR 20 credits in semester 1 and 10 credits in semester...