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: ['5499', '39', 'Q', 'b', 'W', '7155', '2515']

Output: 15208


Input: Consider Input: ['29', 'N', '5061', '7191', 'z', '8367']

Output: 20648


Input: Consider Input: ['e', 'E', '6121', 'b']


Output: 6121


