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: ['e', '9777', '1835', 'N', '2425', '1427', 'o', '4459', '9961', '3285', '5199', 'x', 'e', '7727']
Example Output: 46095

Example Input: ['7355', 'f', 'x', '8083', '177', 'K', 'k', 'l', 's', 'A', 'H']
Example Output:
15615