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: ['S', 'W', '2171', '6405', 'h', 'C', '1597', '7109', 'Q', 'p', '2747', 't', 'J', 'q', '1883', 'v', 'O']

Output: 21912


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

Output: 30290


Input: Consider Input: ['1897', 'v', '9045', '1171', '5621', '8671', 'V', 'D', 'A', 'V', 'U', 'x', '6969', 'K', 'G', '3827', '6963', 'B', 'q', '3113']


Output: 47277