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: ['1123', '2765', '9395', '9695', '7963', '3813', '9987', 'y', 'N', 'F', '2757', 'o', 'r', '4827', '3523', 'G', 'j', '9785', 'C']
Example Output: 65633

Example Input: ['3655', '1349', '6519', '1019', 'v', '4811', '8609', '9147', '8225', '2665', '2627', '5839']
Example Output: 54465

Example Input: ['W', '1391', '1121', '2197', 'k', '5437', 'D', 'g']
Example Output:
10146