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 82 on the one-hour exams,
and 144 on the midterm exam, what is the minimum score on the final exam that the
person can get and still earn a B?