Solve the Problem $80 \%$ Correct on Two One-Hour Exams of 100 Points Each, on a Course

Solve the problem.
-In order to receive a B in a course, it is necessary to get an average of $80 \%$ correct on two one-hour exams of 100 points each, on one midterm exam of 200 points, and on one final exam of 500 points. If a student scores 92 , and 83 on the one-hour exams, and 141 on the midterm exam, what is the minimum score on the final exam that the person can get and still earn a B?

A) 584
B) 404
C) 449
D) 314