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:
['n', 'u', '9595', 'M', 'o', 'K', '5073', 'x']

Ex Output:
14668


Ex Input:
['J', 'S', 'S', 'U', 'w', '7691', '7529', 'B', '3861', '4557', 'd', '569', '1547']

Ex Output:
25754


Ex Input:
['z', '6491', '3689', '4927', '1771', 's', 'A', '5887', '6249']

Ex Output:

29014