Here in sask we can only take a certain amount of infants vs pre school and school age. The max a day home can take is 8 including your own children. So if you have 3 infants you cant take any pre school kids. You could still take on 5 school kids though. So here i charge more for my little ones cause i cant take any pre k kids. I also charge differently though. I charge a daily rate.

30$ for under 30 months.
25$ for pre k kids at home all day
20$ if the pre k kids are in a pre k program ( cause they are gone half the day)
20$ for kinder as well.
15$ for kids that are in gr 1 and up. ( all my full time school kids take a bus and are gone all day)