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: ['4529', '7465', 'S', 'Z', 'v', 'w', '5791', '3363', '2643']

Output: 23791


Input: Consider Input: ['4161', 'E']

Output: 4161


Input: Consider Input: ['n', 'm', '6211', '4329', '6981', '5875']


Output: 23396