In this task, you are given an input list A. You need to find all the elements of the list that are numbers and calculate their sum.

Ex Input:
['5095', '8235', '4901', 's', '4177', '3077', 'l']

Ex Output:
25485


Ex Input:
['2013', 'S', 's', '9353', 'b', 'u', '6687', '5429', '3545', '7269']

Ex Output:
34296


Ex Input:
['305', 'u', '1857', '5861', '6637', '3353', '4369', '6493', 'G', 'S', '5837', 'Z', '2857', '1623', 'V', '1567', '5205', '6753', 'L', 'j']

Ex Output:

52717