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:
['7669', '3367', 'A', 'Z', '6173', '4391', 'f', 'S', '9657', '2631']

Ex Output:
33888


Ex Input:
['Q', '1767', '5523', 'I', '933', 'h', '2189', 'f', '7795', 'X', 'M', 'G', '1215', 'W', '8619']

Ex Output:
28041


Ex Input:
['1661', 'm', '7245', 'B', '123']

Ex Output:

9029