3 sentences

1. 这位销售员非常有礼貌。

   zhè wèi xiāo​shòu​yuán fēi​cháng yǒu lǐ​mào.

   This salesperson is very polite.

   Source: Dong Chinese Dictionary

2. 销售员按销售额的百分之五提成。

   xiāo​shòu​yuán àn xiāo​shòu'é de bǎi​fēn​zhī​wǔ tí​chéng.

   Salespeople receive a five percent commission on sales volume.

   Source: Dong Chinese Dictionary

3. 销售员正在向顾客推销这款新手机。

   xiāo​shòu​yuán zhèng​zài xiàng gù​kè tuī​xiāo zhè kuǎn xīn shǒu​jī.

   The salesperson is promoting this new phone to customers.

   Source: Dong Chinese Dictionary