Hiding/grey out quantities in a combo box

New Here ,

Hi

I am currently creating an interactive PDF which will enable students to select their uniform, size and quantities of uniform required. Students can select either a tunic, dress or trousers. There is an allowance of 3 tops or dresses and then 2 trousers or a student can mix their order and have 2 tops 2 trousers and 1 dress. Therefore I want to be able to grey out of hide other quantities according to their first selection.

Is this possible?

Thank you