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: ['G', 'e', 'R', '4427', '3401', '3065', 'I', '2781', '6829', '5261']

Output: 25764


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

Output: 30290


Input: Consider Input: ['3537', 'h', '4327', 'd', 'P']


Output: 7864