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: ['u', 'e', 'P', 'D', '255', '2573', 'E', 'P', 's', '3725', '3391', 'I', '5323', '885']

Output: 16152


Input: Consider Input: ['4539', '9683', '3095', 'T', 'w', 'w', '657', 'C', 'C', '4195', 'm', 'S', '3191', 'Y']


Output: 25360