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:
['7379', 'I', '2031', '8419', 'w', 'b', '9827', 'X', 'Y', 't', '3789', 'B', 'c', '6599', 'F', '6169', 'V']

Ex Output:
44213


Ex Input:
['4201', '6445', '4009', 'q']

Ex Output:
14655


Ex Input:
['I', '5857', '9693', 's', 'c', 'n', 'S', '8465', 'e', 'Y', 'X', '9981', 'R', 'E', '5429', 'J', '1501']

Ex Output:

40926