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:
['8821', '7221']

Ex Output:
16042


Ex Input:
['i', 'A', 'a']

Ex Output:
0


Ex Input:
['z', '151', '8479', 'q', 'h', '8081', 'L', 'P']

Ex Output:

16711