In Marissa's calculus course, attendance counts for 10% of the grade, quizzes count for 15% of the grade, exams count for 55% of the grade, and the final exam counts for 20% of the grade. Marissa had a 100% average for attendance, 93% for quizzes, 86% for exams, and 81% on the final. Determine Marissa's course average. (E Marissa's course average is |:|%. (Type an integer or a decimal. Do not round.)