Mr. Smith uses the following average for grading Pre - Cal classes: test are 45% of the grade, quizzes count 25%, homework is 15%, and the final exam is 15%. Tom has a quiz average of 80, a homework average of 90, and a test average of 86. What does Tom need to make on the final to get an 85 in class? Assume that the highest he can make on the test is 100.

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