2 sentences for 花費 (huā​fèi — expense)

1. 我们不会为他们的花费买单。

   wǒ​men bù​huì wèi tā​men de huā​fèi mǎi dān.

   We will not pay their expenses.

   Source: CCMatrix

2. 记得在事前列好预算，避免不必要的花费。

   jì dé zài shì​qián liè hǎo yù​suàn, bì​miǎn bù​bì​yào de huā​fèi.

   Remember to make a budget beforehand to avoid unnecessary expenses.

   Source: CCMatrix