Definition: In this task you will be given a list of numbers and you need to find the mean (average) of that list. The mean of a list can be found by summing every number in the list then dividing the result by the size of that list. The output should be rounded to 3 decimal places.
Input: [60.355, -83.762, 246.318, 218.32, 54.829, -78.388, 215.946, -94.467]

67.394