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', '6383', 'P', '8455', '3881', '5821', 'e', 'v', '1421', 'Q', '6377', '3157', '6407', 'q']

Output: 41902


Input: Consider Input: ['g', 'h', '9141', '7825', 'a', 'u', '2389', 'r', '9739', '8337', 'Z', 'Z', '6717']

Output: 44148


Input: Consider Input: ['U', 'y', 'z', 'w', 'q', 'W', 's', 'o', '2933', '7417', 'T', '8733', '5437', '493', 'v', 'C', '7797', 'v', 'Q', 'B']


Output: 32810