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

Output: 20528


Input: Consider Input: ['V', '8137', 'b', 'k', '2081', 'L', '9733', '7525', 'D', '2381', 'O']

Output: 29857


Input: Consider Input: ['i', 'U', 'g', 'n', 'U', '7003', '8665', '3711', '3873', 'c', 'o', 'Y', '377', '3571', '6535', 'Y', '447', '2461', 'V']


Output: 36643