I charge monthly so my ''monthly daily rate' is lower than what I'd charge per day for part time or drop in by 7-9 dollars, depending on days in the month. For a child who is 2 or less days per week, I'd probably charge the full drop in rate. For 3 days/week or more I might split the difference between the two.

Eg: drop in rate = $45, full time 'monthly daily rate' = $37. For 3-4 days a week I might do $40 per day.

The extra amount per day would cover my pain of having to deal with two different families for one space.