It is my policy to obtain one week's worth of fees when a child registers, and then later apply it to their regular fees. I do this in case parents change their mind at the last minute, at least I am not left high and dry. Anyhow, my question is how to apply this policy to a family that does not have a set schedule and therefore will be paying different amounts of fees each week. For example, a family who is using drop-in services and doesn't know their schedule in advance, may need 2 days one week and 5 days the next week...how much should I obtain for a registration fee?