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:
['b', 'i', '7807', 'g', '1611', '6733', 'V', '561', 'C', '8575', 's', 'E', '8129', 'F']

Ex Output:
33416


Ex Input:
['6907', '9123', 'L', '8871', 'q', 'C', 'U', '7403', 'F', '3827', '3951', '8879', '2865', 'x', '6175', 'T', '1147']

Ex Output:
59148


Ex Input:
['3723', 'v', 'j', 'e', '2017', 'd', '4211', '2079']

Ex Output:

12030