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

Ex Output:
23475


Ex Input:
['2215', '4369', 'e', '4979', '4069', 'J', 'L', '789', 'w', 'p', '9533', '8523', '2531']

Ex Output:
37008


Ex Input:
['C', '8159', '1527', '7677', '1725', '5039', '2765', 'Y']

Ex Output:

26892