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:
['1203', '6179', '9835']

Ex Output:
17217


Ex Input:
['6001', '6423', '5591', '8721', 't', 'x', '3723', 'E', 'F', '7353', 'b']

Ex Output:
37812


Ex Input:
['9779', '1651', 'N', 'h', 'S', 'h']

Ex Output:

11430