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:
['E', 'v', 'l', 'c', 'g', '3929', 'q', 'j']

Ex Output:
3929


Ex Input:
['q', 'Y', '6021', '4045']

Ex Output:
10066


Ex Input:
['x', 'X', '9733', '9775', 'o']

Ex Output:

19508