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: ['2923', '3573', '6179', '7673', '6551', 'B', '315', '5169', 'm', '9405', 'm', 'Z']

Output: 41788


Input: Consider Input: ['Y', 'X']

Output: 0


Input: Consider Input: ['G', '4991', 'r', '6641', 's', '6303', 'z', '7001', '5849', '5391']


Output: 36176