Because even though she is invited, it still costs fourty-hundred dollars to get in.
Because even though she has a dress, and a coach, the food to feed the horsepower is a hundred-hundred dollars.
Cinderella does not have all these hundreds dollars
It will be okay though, because Cinderella is nothing if not resourceful.
Cinderella and her six mice will have their own ball. Cinderella will even invite the pretty step-sisters.
The food will be good, and the dancing will be great and the clothing will be spectacular.
Marvelous Pigs in Satin 