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: ['8109', '6811', 'f', 'l', '5869', 'm', '4657', 'y', 'P', '7983', 'o', 's', 'i', 'm', '2141', '4497']

Output: 40067


Input: Consider Input: ['6551', 'm', '3941', 'F', 'K', 'u', '7981', '9581', 'X', 'M', 'N', 'e', 'G', 'i']

Output: 28054


Input: Consider Input: ['H', 'O', 'V', 'f', '1911', '3097', 'Q', '7357', 'B', '6005', '6603']


Output: 24973