If they are before/after only and not planning to take advantage of any additional hours then they would be charged the $20 b/a rate. Just because the kids are not in school has nothing to do with it. They are under contract for all days at $20 and to pay an additional amount for any day used. If they aren't using any full days then why would they be expected to pay for it. Yes it would have been nice to get the extra money but it is very common for parents to take off days or put kids in camps or whatever and not need extra care but yes they should be paying the regular $20.