Really pissed

I just need to vent. I babysit for this family and they usually pay me around $10/hr. Mostly I’ve babysat for them during the evening but since summer started I have been babysitting for them during the day because she is out of school. So, this past day was the first time I stayed over night with her. This is the extent of what I did: yesterday I picked her up from camp at 12pm. Stayed with her all night and dropped her off at camp this morning at 9am. Picked her up from camp again at 12pm and stayed with her until 5pm until her parents got home. So this adds up to 26 hours. In addition to picking her up/dropping her off from camp 3 times, I also took her to a dance and tennis lesson (two separate drives) and took her to lunch and dinner, something her parents asked me to do. They paid for the meals but I drove. So, with the $10/hr rate, I expected at least $260 (for the # of hours) plus a little extra for driving so much. I checked tonight and she paid me $185. I am fuming. I did the math and that’s less than minimum wage, WITHOUT the gas I used. Babysitters: would you be mad too or am I overreacting? Parents: does this seem reasonable to you guys? Is this something you’d pay your babysitter if they stayed overnight with your child? I’m just so upset I could cry. I just need opinions, thanks.