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: [-60.218, -55.744, 34.902, 46.241, 54.74, 29.511, -93.037]

-6.229