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:
['D', '8591', 'b', 'n', 'e', '883', '8923', '245', 'z', '5643', 'C', '2911', '9275', '711', '7299', '3449', '4799', '6065']

Ex Output:
58794


Ex Input:
['z', 'E', 'u', '4437', '7767']

Ex Output:
12204


Ex Input:
['5191', 'C', 'U', 'S', '5949', '7781', 'h', '6057', 'e']

Ex Output:

24978