做手脚

wǒ zài yě bù shàng nà jiā diàn li mǎi dōng xi le yīn wèi tā men lǎo shì zài wǒ de zhàng dān shang zuò shǒu jiǎo

我再也不上那家店里买东西了，因为他们老是在我的账单上做手脚。

I refuse to trade with that store ever again, because they keep cheating me on the bill.

wǒ men zhī dào tā yī zhí zài zuò shǒu jiǎo bù guò wǒ men yǐ qián cóng méi yǒu dāng chǎng zhuā dào guò tā

我们知道他一直在做手脚，不过我们以前从没有当场抓到过他。

We knew he’d been cheating, but we’d never caught him at it before.

zài shù zì shang zuò shǒu jiǎo

在数字上做手脚

juggle the figures