I have a full time rate and then a part time rate, for either 2 or 3 days. My 3 day rate works out to be about $8.50 more per day than the full time rate. It is hard to find someone to fill the other two days so I don't see a problem charging more per day to try and cover some of the losses from a full time spot. I also don't mind having the part time 3 day a week spot as it gives me a couple lighter days a week.