hong kong

you should say:

Yes, I want to know that where can I buy it and how much?
是, 我想知在那裡買到它和幾多錢?

Yes, I would like to know where I can buy it and, how much it is.

yes, i asking that where can i buy ,and how much is it??????????


這問題該改寫成


yes, i ask that where can i buy ,and how much is it??????????

因為asking 是助動詞，不能獨立行使呵。哈哈...........