Your fees are reasonable.
I charge $25 a day per kid. Only I do NOT offer any sibling discounts and they pay me the $25 if they are here or not. That way I know I'm getting paid and they are paying not only for care but their spot here also. I charge $1 a min early or late so $5 for 15min is really cheap. I don't watch SA due to the fact that I can't ever guarantee when they will be here so I care for only newborn to kinder. Hope this helps!