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:
['2923', '3573', '6179', '7673', '6551', 'B', '315', '5169', 'm', '9405', 'm', 'Z']

Ex Output:
41788


Ex Input:
['X', '6189', '5435', 'y', '8931', '8987', 'F', '8377', 'k', '8631', '8717', 'q', '2923', 'g', '7225', 'j']

Ex Output:
65415


Ex Input:
['3097', 'e', '9445', 'G', 'C', 'j', '3643', '6799', 'S', '3727', 'K', 'S', '7645', 'j', '8789', 'M']

Ex Output:

43145