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

Output: 17531


Input: Consider Input: ['R', '3361', 'c', 'S', 'g', '3829', '7347', '6633', 'e', '9227']

Output: 30397


Input: Consider Input: ['3657', '2863', 'g', '8985', '3353', '8479', 'X']


Output: 27337