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: ['9509', 'o', 'l', '9873', 'h', 'N', '2059', '8595', 'D', 'L', '5913', 'o', '1443', 'C', 'y', 'K', 'J', 'a', 'X', 'E']
Example Output: 37392

Example Input: ['8109', '5635', 'u', 'M', '1009']
Example Output: 14753

Example Input: ['6569', 's', '2769']
Example Output:
9338