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: ['7293', '2619', '2459', '3829', 'J', 'c', 'a', 'a', '311', 'x', 'r', '6123', '2847', '4809']

Output: 30290

Input: Consider Input: ['9989', 'B', 'E', '5181']

Output: 15170

Input: Consider Input: ['Q', '3287', '3981', 'P', '107', '3265', '7001', '6075', '8123', 'G', '1841', '2367', '7599', 'B', 'k', '1277', 'U']
Output: 44923