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:
['t', 'v', 'B', 'Y']

Ex Output:
0


Ex Input:
['M', '9387', '7125', 'c', '1295', 'X', 'l', '9867']

Ex Output:

27674