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:
['A', '9775', '5867', 'n', '1329', '5973']

Ex Output:
22944


Ex Input:
['6515', '5525', 'o', 'Q', '9049', 'f', 'p', 'X', '2057', 'h', '7585', '3617', '7817']

Ex Output:
42165


Ex Input:
['w', 'R', '8599', 'X', 'l', 'z', 'k', 'u', '4723']

Ex Output:

13322