YOU SAID:
How much for that hat?
INTO JAPANESE
あの帽子はいくらですか。
BACK INTO ENGLISH
How much is that hat?
INTO JAPANESE
いくらですか?
BACK INTO ENGLISH
How much does it cost?
INTO JAPANESE
それはどれくらいの費用ですか?
BACK INTO ENGLISH
How much does it cost?
You've done this before, haven't you.