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.

Input: Consider Input: ['X', '989', 'U', '9551', '6385', 'Y', '1433', 'J', '1833', '685', 'u']

Output: 20876


Input: Consider Input: ['W', 'O', 'c', 'r', 'E', 'w', '9811', '6421', '3543', '4293', '8255', 't', '229', '745', 'w', 'p', '6861', '5305', 'h']

Output: 45463


Input: Consider Input: ['C', 'o', 'x', '6603', 'E', 'z', 'F', 'y', '159']


Output: 6762