New to the site and wondering whether folks charge flat rates for before and after care? I have 2 siblings and I charge $20 per day with one snack for each. But there have been many times that they don't come because their grandparents pick them or up or only one comes or they take holidays...and of course Mom doesn't pay for those days. Any suggestions? She has asked for me to look after them again in Sept. but I would like to set up a flat fee, is that common? Would it be okay to ask for payment whether they're here or not, unless I have to cancel due to sickness?Thanks in advance!!