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:
['U', '5607', 'Q', 'j', 'I', '3745', '3031']

Ex Output:
12383


Ex Input:
['5715', 'r', 'R']

Ex Output:
5715


Ex Input:
['5729', '5517', '213', 's', '1931', '9395', 'x', '2727', 'J']

Ex Output:

25512