how much is fair if you are sharing a ride and you work in the same place? $20 is fair?

yes indeed

Depending on how far you drive I would say about $10-$15 would be reasonable there and back two times. But if its' sort of far then $20 is fair.

My mom use to give me money for the baby sitter an I would like "forget" to give it to her then I would go get the money an go to the store an buy allsome stuff an then the baby sitter would tell mom that she had not been paid an I would say I lost the money! That only worked twiced though.

It depends how many miles have to be driven. $20 for one mile would be bs, but for 10+ miles might be fair.

SURE