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: ['d', '6851', 'o', '5521', 'l', '3911', 'w', '1005', 'e', '3323', 'r', '7311', '4377']
Example Output: 32299

Example Input: ['T', '3603', 'u', '1643', '8911', '1433', 'g', '6431', '2863', '4807', 'j', '6525', '9997', '5871', '3703', '9995', '6429', '2255', '3527', 'y']
Example Output:
77993