In Marissa's calculus course, attendance counts for

20%

of the grade, quizzes count for

20%

of the grade, exams count for

45%

of the grade, and the final exam counts for

15%

of the grade. Marissa had a

100%

average for attendance,

89%

for quizzes,

82%

for exams, and

81%

on the final. Determine Marissa's course average.