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:
['5095', '8235', '4901', 's', '4177', '3077', 'l']

Ex Output:
25485


Ex Input:
['5397', 'F', 'i', '9445', '1551', '9525', '7593', 'o', '7979', 'H', 'G', '971']

Ex Output:

42461