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: ['6565', 'T', 'O', '2901', '5121', 'y', '9617', 't', '7825']
Example Output: 32029

Example Input: ['6563', 'R', 'M', 'B', 'b', 'E', '9911', '7327', 'J', '7389', 'w', 'b', 'c', '1527', 'K', 'r', '5441', '6823', '8455']
Example Output: 53436

Example Input: ['9033', '8509', 'Q', 'Z', 'r', 'L', 'Y', 'L', 'j', 'S', '3057', 'L', '5281']
Example Output:
25880