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:
['K', '5815', 'E', 'c', '7379', '4995', 'w', 'B', 'j', '6227', 'B', '733', '1491', '3191', '9413', '2751', 'O', 'J', '6239', '3521']

Ex Output:
51755


Ex Input:
['57', '9977', '2657', 'p', '9573', '7745', '4755', 'U']

Ex Output:
34764


Ex Input:
['J', 'o', 'j', '3619', '439', '9125', '9781', '8425', '4111']

Ex Output:

35500