My b and a rates are $15 for either or and $25 for both ....and they have to pay the full days fees $40 for pa days, school holidays, snow days, summer.....ect...... you are being taken advantage of. if it were me I would send out a notice saying in two weeks(whatever notice you have stated in your contract for changes) the rates are being raised to xxxx for b and a and xxxx for full days. cause really it wouldn't be worth it to me to look after someone elses kid for $45 a week. Hopefully they aren't your only kids and you can afford to let them go if needed