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: ['h', '2335', '2669', '6035', '9901', '7721', 's', '6181', 'C', 'l', 'x', '8275', '1103', 'S', '6447']

Output: 50667

Input: Consider Input: ['9401', 'w', 'b', '8287', 'n', 'O', 'H', 'h', '45', '2337']

Output: 20070

Input: Consider Input: ['U', 'n', 'z', '9333', '6511', 'Q', 'L', '1503', '8839', 'C', 'E', 'X', '5765', '9267', 'b', 'u', 's']
Output: 41218