YOU SAID:

I wonder how long this would take

INTO JAPANESE

これがどのくらいかかるのだろうか

BACK INTO ENGLISH

I wonder if this is how long it takes

INTO JAPANESE

これはどのくらいかかるかしら

BACK INTO ENGLISH

How much does it cost?

INTO JAPANESE

それはどれくらいしますか？

BACK INTO ENGLISH

How much is it?

INTO JAPANESE

いくらですか？

BACK INTO ENGLISH

How much is it?