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:
['2729', 'W', 'i', '9073', '343', 'j', '2329', '9159', '4825']

Ex Output:
28458


Ex Input:
['7973', 'J', '9035', 'H', '4051', '2661', 's', 'z', '8225', 'M', '4153']

Ex Output:
36098


Ex Input:
['3903', 'e', '977', 'H', '71', 'y', 'B', 'G', 'k', 'x', 'p', 'p', 'c']

Ex Output:

4951