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:
['8147', '3191']

Ex Output:
11338


Ex Input:
['t', 'x', '5629', 'k', '2003', 'v', '541', 'l', 'v', '7983', '677', '6173', 'z', 'J', 's', 'u', '2187', 'Y']

Ex Output:
25193


Ex Input:
['o', 'z', 'B', '1367', '8301', '1823', '9231', 't', '855']

Ex Output:

21577