question: Why was Frederick 's defeat of Daun so costly ?
answer: he suffered very heavy casualties , and the Austrians retreated in good order .
turker_answer: Frederick 's defeat of Daun was so costly because he suffered very heavy casualties , and the Austrians retreated in good order .
rule-based: Frederick 's defeat of Daun so costly was because he suffered very heavy casualties , and the Austrians retreated in good order .