Ménpiào duōshao qián？

门票多少钱？

How much is the admission fee?

Notes:

门票(ménpiào): admission fee

多少钱(duōshao qián):how much of the money

Example:

A: 门票多少钱？

    Ménpiào duōshao qián？ 

    How much is the admission fee?

B: 免费。

    Miǎnfèi.

    It's free.