A firm had sales revenue of 1 million dollars last year. It spent 600,000 dollars on labor, 150,000 dollars on capital, and 200,000 dollars on materials. What was the firm\textquotesingle s accounting profit? 
选项为:A:0 dollar  B:50,000 dollars  C:400,000 dollars  D:650,000 dollars  E:1,000,000 dollars  请回答其中一个选项.