Day care rates for two children, after school only?

My husband and I have agreed that I will not be starting college until our two children are in school full time. My husband and I plan to send our children to a private school which gets out at 3. My classes I plan to take, as of now do not end until 4:30. I understand rates vary from area to area but what is a ballpark price we can expect to pay for daycare every weekday for two - two and a half hours for two children? (BTW this is years down the road...) Our oldest will be 6 and our youngest will be 5.