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:
['8529', '2657', '1599', 'b', '8187', '7005', '7481']

Ex Output:
35458


Ex Input:
['8683', 'p', '47', '8983', 'g', 'u']

Ex Output:
17713


Ex Input:
['V', '699', '8563', 'n', '3683', '2087']

Ex Output:

15032