Should the extra change received at the store be forgotten or returned?

商店多找给我们的零钱是被忘掉还是应该被归还？

youdao

When he found his mistake, he walked many miles to the customer's house to give him the extra change.

在他发现自己的错误之后，他走了好几英里来到这位顾客家里，把该找的钱交给了他。

youdao

She says customers are buying plenty of other items with the extra change they get from filling up.

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The gig with expert network firm Primary Global was just some extra pocket change.

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