My daughter has been attending Saturday performing arts classes for a year now. The company hold a big show with three performances every October - this is our first. I ha e already paid £100 pounds for a costume& there is another I have to make/source myself. I can only attend one out of three shows as tickets are £25 each. Today they have sent me an invoice for £87. This is for a professional chaperone to look after my DD back stage and extra rehearsals in the run up to the show - should I be paying for this? The school are obviously profiting from the show my daughter is performing. Am I being tight?