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:
['g', 'A', 'm', '4005', '8079', 'G']

Ex Output:
12084


Ex Input:
['3683', 'U', 'x', '313', 'n', '3837', '3299', '2081', '2773', 'r', 'O', '257', '6647', '585', 'o']

Ex Output:
23475


Ex Input:
['b', '3507', '561', 'b', 'N', 'N', '335', '5765', 'W', '7219', 'W']

Ex Output:

17387