For me, full time is 4 or 5 days.
Part time is 2-3 days, +$5/daily rate
Drop in +$10/daily rate

I don't do half days. So if you only need a few hours, you still pay the daily rate, whatever that is for you (ft, pt or drop in).

As to your question: I don't think that's too much. Don't break it down hourly. Break it down by spot. $35 for a guaranteed spot each day where a child is loved and cared for by a reliable person is a DEAL