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: ['6367', '9923', '9141']

Output: 25431


Input: Consider Input: ['6669', 'n', 't', 'N', 'x', '8153', 'W', 'v', 'B', '3181', 'y', 'e', '3491']

Output: 21494


Input: Consider Input: ['9989', 'B', 'E', '5181']


Output: 15170