6 sentences

1. 这种额外收费其实是变相涨价。

   zhè zhǒng é​wài shōu​fèi qí​shí shì biàn​xiàng zhǎng​jià.

   These extra fees are actually a disguised price increase.

   Source: Dong Chinese Dictionary

2. 所有的额外费用都已计算在内。

   suǒ​yǒu de é​wài fèi​yòng dōu yǐ jì​suàn zài​nèi.

   All additional costs have been included.

   Source: Dong Chinese Dictionary

3. 他通过做兼职来赚取额外的收入。

   tā tōng​guò zuò jiān​zhí lái zhuàn​qǔ é​wài de shōu​rù.

   He earns extra income by doing part-time jobs.

   Source: Dong Chinese Dictionary

4. 酒店将对延迟退房收取额外费用。

   jiǔ​diàn jiāng duì yán​chí tuì fáng shōu​qǔ é​wài fèi​yòng.

   The hotel will charge an additional fee for late check-outs.

   Source: Dong Chinese Dictionary

5. 这些额外的任务加重了他的工作负担。

   zhè​xiē é​wài de rèn​wu jiā​zhòng le tā de gōng​zuò fù​dān.

   These extra tasks have increased his workload.

   Source: Dong Chinese Dictionary

6. 由于这是预付订单，你现在不需要支付额外费用。

   yóu​yú zhè shì yù​fù dìng​dān, nǐ xiàn​zài bù xū​yào zhī​fù é​wài fèi​yòng.

   Since this is a prepaid order, you don't need to pay any extra fees now.

   Source: Dong Chinese Dictionary