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:
['h', '2335', '2669', '6035', '9901', '7721', 's', '6181', 'C', 'l', 'x', '8275', '1103', 'S', '6447']

Ex Output:
50667


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

Ex Output:
36449


Ex Input:
['9661', '5303']

Ex Output:

14964