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: ['f', '6703', 'c', 'c', 'l', '2511', '6507', 'b', '9727', 'l', '1251', 'I', '5231', '91', 'L', 'M', 'd']
Example Output: 32021

Example Input: ['a', 'j', 'v', '619', 't', 'a', '5777', 'x', 'R', 'P', '8897', 'j']
Example Output:
15293