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: [-62.979, 248.63, 30.923, -50.368, 111.189, 91.564, 218.971, 249.551]

104.685