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:
['7067', 'E', 'C', '1879', 'Z', 'u', 't', '2053', '6769', 'r', '5207', '7009', 'H', '5587', 'i', 'M', '1357', 'A']

Ex Output:
36928


Ex Input:
['L', 'i', '9225', 'w', '5365', '8077', '2733', 'W', '8493', 'B']

Ex Output:
33893


Ex Input:
['2383', 'C', '7273', 'X', 'O', 'i', 'a', '2379', 'V', 'P', 'p', 'p', 'F', 'u', '8915', 'Y', 'c', 'a']

Ex Output:

20950