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.

Example Input: ['2585', '3043', 'w', '7697', '53', 't', 'A']
Example Output: 13378

Example Input: ['O', '9829', '5265', 'U', 'z', '2843', '1483', '9293', '1327', '2015']
Example Output: 32055

Example Input: ['957', 'g', '1965', '627', '2443', '4923', 'O', 'A']
Example Output:
10915