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:
['e', 'K', 'A', 'V', '1169', 'n', '8729', 'V']

Ex Output:
9898


Ex Input:
['g', '5301']

Ex Output:
5301


Ex Input:
['2037', 'l', 'S', '2563', 'W', '1611', '8181', 'h', 'q', '9689', '9069', '9593', '2129', 'C']

Ex Output:

44872