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: ['q', '867', 'e', 'z']

Output: 867


Input: Consider Input: ['6921', 'a', 'U', '2821', '2111', 'h', '3937', '3697', 'd', '6309', 'q', '7961', '5287', '5375', '2721', '4523', 'V', '8633', 'c', '7643']

Output: 67939


Input: Consider Input: ['V', 'm', 'J', 'e', 'm', 'Z', 'y', '23', 'i', '973', '7451', '8211']


Output: 16658