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: ['5347', 'E', 'a', '5379', '405', '1171', 'v', 'J']
Example Output: 12302

Example Input: ['6217', 'A', '1925', 'o', '1433']
Example Output: 9575

Example Input: ['5277', 'o', '8841', '8073', '7393', 'h', 'A', 'l', '121', '1499', '8761', '35', 'g', 'r', 'D', '9257', '2833', '8035', '9745', 'A']
Example Output:
69870