Keep the receipt in a safe place.

Is there anything else you would like to buy?

No, thank you. I guess that's it. By the way, in case there's a flaw in this CD player, can I return it?

Yes. But you must return it within 30 days.

Is there a charge for that? I know other stores have a restocking fee.

There will be no charge at all. However, you must show us the receipt. (The cashier is handing the receipt over to John for him to sign.) Could you sign it here, please?

All right. Keep your receipt. If something comes up, you can show it to us and we'll give you a refund.

Thanks. I'll put it in a safe place.