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: ['2729', 'W', 'i', '9073', '343', 'j', '2329', '9159', '4825']

Output: 28458


Input: Consider Input: ['n', '6729', 'p', 'D', 'o', '1213', 'e', '6951', '2341', '9997', 'e', 'M', 'x', 'R']

Output: 27231


Input: Consider Input: ['6809', '5833', 'V', '7747', '5381', 'w', '6259', '7455', '8459', 'R', 'g', 'I', '4641', '6047', 'r', '685']


Output: 59316