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: ['W', '3561', '4631', '8379', 'W', '6857', '2723', '5393', 'h', 'g', 't', 'I', 'R', '2321', 'l']

Output: 33865


Input: Consider Input: ['K', 'O', 'p', '1669', '8647', '3417', 'a', '8903', 'V', 'E', 'l', 'a', '5177', 'J', '6559', '5377', 'X', '9427']

Output: 49176


Input: Consider Input: ['G', 'h', 'Y', 'M', '9537', '3323', '6381', 'Z', 'f', '8831', 'x', '9901', 'B']


Output: 37973