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:
['7231', '2813', '51', '1745', 'c', 'a', '4929', '3185', '5707', '2095', 'f', 'S']

Ex Output:
27756


Ex Input:
['135', 'a', 'X', '8067', '8447', '4009', '4221', 'o', 'A', 'x']

Ex Output:
24879


Ex Input:
['6215', 'h', '1083', '1703', 'r', 'n', '8515', '8953', '3477', 'a', 's', 'E']

Ex Output:

29946