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: ['887', '8133', 'X', '2253', '8461', 'I', '5425', 'Z', 'z', 'r']

Output: 25159


Input: Consider Input: ['I', 'o', 'E', '3039', 'M']


Output: 3039