Ok so I start school today and need to leave the house at 4:00. I have amde arragements for my neighbor to watch my 3 month old son. She is 14 but her parents are going to be home and she can always come up here if she needs to use his swing. It is only for an hour and half 2 times a week. Well I did my Math wrong and said that I would do $40 a week. Well I was thinking $20 a week which is $7 an hour. Well I feel really bad if I say something like sorry I did the math wrong. What should I do? Should I tell her that I made a mistake and I want to pay her $7 an hour or should I just pay her $40 a week which I can't really afford? HELP!