answer: #Person1# says #Person2# can return the CD player without any charge if there is a flaw within 30 days.
documents: #Person1#: Did you find everything ok today?
  #Person2#: Yes, I did. By the way, in case there is a flaw in this CD player, can I return it?
  #Person1#: Yes. But you must return it within 30 days.
  #Person2#: Is there a charge for that. I know other stores have a restocking fee.
  #Person1#: There will be no charge at all. However you must show us the receipt. Could you sign it here, please?
  #Person2#: Thank you.
  #Person1#: All right. Keep you receipt. If something comes up, you can show it to us and we will give you a refund.
  #Person2#: Thanks. I'll put it in a safe place.