Recital Fee Option/Charges for additional class

As a studio that charges X for Recital fee which includes 1 costume and Y for each additional costume, we need a way to charge X and Y. Charging each class for Y and then adding the difference between X and Y is confusing to the clients who understand the initial charge as including the costume.

This could be fixed by being able to check students with more than one drop down filter to add a fee. If we could check all recital students and add the fee, then all recital students in 2 classes and add a fee for 2nd costume, all recital students in 3 classes, etc. We would be able to do this process in a few quick steps.