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

Ex Output:
25754


Ex Input:
['h', 'a', '1645', '2391', '759', '519', '3331', '2831', '3427', '9893', 'u', 'J', '7391', '8379', 'V']

Ex Output:
40566


Ex Input:
['I', 'L', 'z', 'M', 'F', 'O', 'g', 'I', 'i', 'I', '6885', '5615']

Ex Output:

12500