Dressing in the sports meeting, the class charges clothing fees, which should be a unified purchase of clothing, which seems to be unified.
The money collected by organizing a trip in class should be used to buy tickets, water and food.
You don't have to take part in activities if you don't like it.
In fact, if you think about it, it's good to just pay and not worry about the rest.
Of course, if the fees are obviously unreasonable, you can report them to the school.