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.
[-19.074, 72.372, 213.216, 101.647, 143.126, 145.458, 80.88, -93.455]