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: ['B', 'K', '9399', 't', '5541', 'w', '1939', '7841', 'q']

Output: 24720


Input: Consider Input: ['K', '479', 'u', '3489', 'o', '9589', '7153', '7649', '123', 'a', 'A', '3951', '847', 'N', 'R', '947', '9243', 'G', 'a']

Output: 43470


Input: Consider Input: ['8063', '7383', '7957', 'r', '5319', '7327', 'w', 'R']


Output: 36049