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:
['6815', 'A', '1055', '4687', '8675', '4615', 'a', '2127', 'w', 'l', 'J', '5025', 'c', 't', '9727', 'G', '8431']

Ex Output:
51157


Ex Input:
['7361', '3605', 'V', '2039', '9665', 'X', 'b', '1195', '657', '6509', '7195', '2013', '1847', 'v', '9499', '1761']

Ex Output:
53346


Ex Input:
['x', 'l', 'Z', '3337', 'P', '6929', 'b', '9961', '8083', '6299', 's', 'V', 'a', '5187', '8833', '6301']

Ex Output:

54930