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: ['3809', '9401', '63', '5705', 'u', '6275', 'k', 'l', '1171', '9365', 'L', 'O', '7431', '8567', 'h', '6135']
Example Output: 57922

Example Input: ['f', 'h', '8035', '2377', '1629', 'a', '765', '7199', '2177', 'l', '5681', 't', '7037', 'D', 'W', '4717', '6083', 'u', 'G', '2147']
Example Output:
47847