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: ['d', '4553']

Output: 4553


Input: Consider Input: ['8691', '6251', 's', 'B', 'R', 'N', 'v', 'w', 'k', '9579', 'n', '2087', '4383', 'q', 'e']


Output: 30991