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:
['5215', 'c', '839', 'V']

Ex Output:
6054


Ex Input:
['G', 'e', 'R', '4427', '3401', '3065', 'I', '2781', '6829', '5261']

Ex Output:
25764


Ex Input:
['I', 'E', 'M', 'q', 's', '4739', '4829', 'J', 'N', '8695', '2905', '4481', 'N', '6211', 'I', '5035', '4473']

Ex Output:

41368