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: ['9125', '1443', '2303', 'O', '8463', '401', '3983', 'g', '4327', 'z', 'n', 'F', 'Q', 'j', '9885']
Example Output: 39930

Example Input: ['7459', '491', '7823', '6965', 'H', '109', 'R', 't', '3959', '2821', 'R', '2807', 'o', 'v', '1305', 'a', '1411', 'r', '3669']
Example Output: 38819

Example Input: ['5093', 'H', 'T', 'L', 'g', 'd', 'E', 'z', 'f', 'N', 'p', 's', 'e', 'E', 'f', 'z', 'E', '7939', 'Y', 'E']
Example Output:
13032