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: ['3319', 'e', 'c', 'G', '2399', '1557', '4813', 'z', 'U', '4895', 's', '1193', 'A', 'G']
Example Output: 18176

Example Input: ['2691', '3861', '7087', '4661', '6527']
Example Output: 24827

Example Input: ['B', 'W', 'Q', 't', '3659', 'E', 'Z', 'B', '6079', '5755', '593', 'n', 'i', 'y', 'h', '2091']
Example Output:
18177