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: ['s', 't', 'W', '163', 'v']

Output: 163


Input: Consider Input: ['3705', '9217', 'C', '4609']

Output: 17531


Input: Consider Input: ['A', '7707', '4277', '9419', 'F', 'x', '9251', 'C', '8543', 'm', '1421', 'W']


Output: 40618