How much does this necklace cost?

这条项链多少钱？

A: I want to buy a necklace for my girlfriend.

我想给我女朋友买一条项链。

B: Which one do you like?

你想要哪一条？

A: Please show me that one. How much does it cost?

请给我拿那条。多少钱？

B: It costs 400 dollars.

400美元。

02

How much are these?

这些总共多少钱？

A: Please show me some notebooks and a pen.

请给我拿些笔记本和一支钢笔。

B: Here you are, Anything else?

给您，还需要其他的吗？

A: No, thank you. How much are these, please?

没有了，谢谢。请问这些总共多少钱？

B: That will be 3.5 dollars.

共3.5美元。

其他表达法：

How much is it altogether?

What's the price?

How much are you asking for this?