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', '6153', 'A', '6173', 'x', '7527', '8501', 'g', 'r', 'K', 'I', '3103', '8347']

Output: 39804


Input: Consider Input: ['N', 'O', '2635', '8891']

Output: 11526


Input: Consider Input: ['7451', '6483', 'R', '293', '3071', 'A', '3335', 'E', 'f']


Output: 20633