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:
['C', '9973', 'b', '693', 'y', 'H', 'C', 'P', 'b', 'J', 'f', 'T', '2317', 'O', '5755', '8201', 'p', 'y', '8721', 'i']

Ex Output:
35660


Ex Input:
['q', 'U', '2523', '1279', 'g', '5659', 'S', 'u', 't', '3085', 'R']

Ex Output:

12546