YOU SAID:

this will cost an arm and a leg

INTO JAPANESE

これには腕と脚がかかります

BACK INTO ENGLISH

this takes an arm and a leg

INTO JAPANESE

これには腕と脚が必要です

BACK INTO ENGLISH

This requires arms and legs

INTO JAPANESE

これには腕と脚が必要です

BACK INTO ENGLISH

This requires arms and legs