Shopping with Teens

I am getting of an age where I hate shopping.  I hate it more with my teen daughters. They keep arguing or playing around.  One daughter brings up purchases from the past.  Remember when you bought Michelle something.  You owe me. I'm surprsed she doesn't say, remember that steak dinner when you were in your 20's, well you owe me.  The worst thing is that they have no concept of money.  They want evryryhing, no matter the cost.  Don't even bother to ask them to help.  That is like talking to an empty room.