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:
['901', '1939', '7637', '8863', 'X', '5003', '8791', '4757', 'E', '1525', 'y', '9735']

Ex Output:
49151


Ex Input:
['g', 'A', 'm', '4005', '8079', 'G']

Ex Output:
12084


Ex Input:
['3843', '3569', 'o', 'b', 'q', '9253', '5729', 'U', '6169', '5551', 'f', 'E', '1275', 'N', 'u']

Ex Output:

35389