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: ['5021', 'q', '4109', 'g', 'w', 'C', 'w', '239', 'N', '9755', '8591', '7083', 'Q', '7907', 'w', 'U', 'a', '4901', 'k', 'G']
Example Output: 47606

Example Input: ['3051', 'Z', 'q', 'u', 'x', '2747', 'e', 'B', '4225', 'Q', 'R', '4629', 'F']
Example Output: 14652

Example Input: ['M', 'X', 'i', '5201', '4845', 'u', '1479', '2397', 'N', '6057', 'c', '8955', 'I', '3439', '1407', 'h', 'q']
Example Output:
33780