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

Ex Output:
28041


Ex Input:
['7361', '6913', '3605', '2081', '7619']

Ex Output:
27579


Ex Input:
['2501', '4807', '7149', '6291', '6927', '7631']

Ex Output:

35306