这是购物收据｡

Zhè shì gòuwù shōujù.

Here's the receipt.

Related expression

我们提供60天的退货保证｡

Wŏmen tígōng liùshí tiān de tuì huò băozhèng.

We offer a 60-day return policy.

Tips

The sales receipt plays an important role when you want to return the items you have bought. Usually the store asks you to show the receipt when you request a return, in order to prove that the items were bought at the store and are still within the warranty period. So always keep your receipts safe during the warranty period.

Source: Chinese 101 in Cartoons (for Travelers) published by Sinolingua Press