If a bag of chips cost $1 how much change do they give you back

Really just depends on how much you give them. For example, if you give them $4 you will get $3 in change.

It depends how much you give them so if you give them 10 dollars 9 dollars in change if you give them 5 dollars 4 dollars in change if you give them 2 dollars you get 1 dollar in change and if you give them a 1 dollar you get no change