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:
['5573', '6221', 'C', '8649', '6603', 'q', '9403']

Ex Output:
36449


Ex Input:
['4515', '3911', 'M', 'T', 'w', 'F']

Ex Output:
8426


Ex Input:
['c', 'M', 'G', '9331', '4611', 'Y', '95']

Ex Output:

14037