This is pretty complicated. You'll have to use scripting for this and
I'll tell you how I'd approach this with JavaScript.First of all you
need to decide at what point you want to populate this field with the
drop down selections. I think you have two options.Option 1 -
Automatically calculate this field each time a user makes a drop-down
selection. It's possible that a user will enter data and then change a
drop down value so you'll have to account for this.Option 2 - Create an
update button th...