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:
['w', 'V', '3359', '8847', '7551', '2481', 'Y', 'j', 'L', 'G', '7905', 'v', '4141', '2229', 'k', 'H', '3517', '3885', '3665', 'O']

Ex Output:
47580


Ex Input:
['1875', '9833', 'i', '7493', 'J', 'P', 'z']

Ex Output:
19201


Ex Input:
['5107', '509', '1567', '817', '5269', 'w', '2663', '4061', 'i', 'H', '5277', '4941']

Ex Output:

30211