卖这个能赚多少钱啊？

Mài zhè gè néng zhuàn duōshao qián a?

How much can you earn from selling this?

赚钱不容易。

Zhuànqián bù róngyì.

Earning money isn't easy.

赚钱有时候也要靠运气。

Zhuànqián yǒushíhou yě yào kào yùnqi.

Earning money sometimes depends on luck.