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:
['1001', 'T', 'w', 'f', 'Q', '4035', 'b', 'q', 'x', 'R']

Ex Output:
5036


Ex Input:
['G', 'o', 'g', 'I', 'S', '9193', 'G', 'C', '2481', '435', 'm', '1005', '5605', '6501', 'D']

Ex Output:
25220


Ex Input:
['Y', 'D', 'S', 'm', '517']

Ex Output:

517