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: ['t', '7015', '2239', 'I', 'F', 'E', '1363', '9615', '6179', '2539', 'z', '8745', '1319', '4715', '9071', 'K', '3707', '6149', 'd']
Example Output: 62656

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

Example Input: ['T', 'D', '5179', '5777', 'i', '4027', '9613', '3445', 'T', '4999', 'J', '2123', '4563', 'w', '1739', '3881', 'g', '5943']
Example Output:
51289