In Marissa's calculus course, attendance counts for 5% of the grade, quizzes count for 15% of the grade, exams count for 60% of the grade, and the final exam counts for 20% of the grade. Marissa had a 100% average for attendance, 89% for quizzes, 82% for exams, and 85% on the final. Determine Marissa's course average.
