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: ['5829', '9755', '67', 'F', '6347', 'p', 'i', 'X', 'z', 'o', '2321', 'F', '6145', 'B', '3903']
Example Output: 34367

Example Input: ['N', '1337', 'C', 'T', '863', 'j', '2369', 'P', 'A', 'x', '5725', '2333', 'Q', '9149', 'Q', '8529', 'N']
Example Output: 30305

Example Input: ['t', '6593', '2103', '9347', 'd', '7289', '5637', '399', '8211', 'c', '2517', 'E', 'F']
Example Output:
42096