Taking everything else aside why is their uniform shop indirectly discriminating against the girls?
If the uniform is 'gender neutral' and the ethos is to treat girls and boys equally, why are the girls supposed to pay a premium for this equality?!
It seems a little bizarre to be going full on 'we shouldn't have any differences' but to then charge the girls more for an item of clothing thats supposed to be the same.
Ultimately when it comes down to it, they can tell the difference between girls and boys because they still have different designs for different body shapes and its still the girls who come out most unfavourably. Funny that.
I bet that sales of girls uniform are higher than boys too.