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.

Input: Consider Input: ['6121', 'S', '8683', 'Y', '6107', 'B', '6193', '5555', '365', '945', '1439', '7257', 'g']

Output: 42665


Input: Consider Input: ['4869', 'L']

Output: 4869


Input: Consider Input: ['2705', '7625', 'O', 'S', 'f', '9489', 'G', '6549', '1797', 'L', 't', 'N', 'U', 'w', '6145', 'R', '3715', 'H', 'w', '5481']


Output: 43506