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: ['9403', '2607', 'G', '7901', 'K', '7967', 'a', 'n', '1967', 'x', 'g', '1081']

Output: 30926


Input: Consider Input: ['m', 'g', '7251', '5873', '59', '7345']

Output: 20528


Input: Consider Input: ['4541', '577', 'W', 'x', 'E']


Output: 5118