Last weekend I bought a snowboard that cost $450, but salesclerk charged me for a different, smaller snowboard that only cost $200. I tried to tell her,but she was talking to her colleague and didn't listen to me. I walked out of the store with the more expensive snowboard, but now I'm feeling really bad. I told my dad and he thinks I should go back and offer to pay the correct price. I don't know what to do.