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: ['x', '1887', 'E', '3995', '5677', '2749', '9951']

Output: 24259


Input: Consider Input: ['E', 'X', 'C', 'v', '2803', 'g', 'b', '763']

Output: 3566


Input: Consider Input: ['715', '6331', 'U', 'Z', '3905', 'M', 'a']


Output: 10951