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:
['g', '5301']

Ex Output:
5301


Ex Input:
['8739', 'K']

Ex Output:
8739


Ex Input:
['1595', 'Z', '3481', '9257', 'e', '6135', 'P', '7965', 'a', '5277', 't']

Ex Output:

33710