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: ['7831', 'O', '6017', 'v', 'U', '5761', 'Q', 'Q', 'w', '8465', 'Z', 'P', 'i', 'u', '1635', 'n', '8471', '4213']

Output: 42393


Input: Consider Input: ['s', '3881', 'l', '5271', '9227', 'Z', '5429', '7691', '6127', '6301', '8533', 'T', '233', 'j', '1685', 'F', 'b', '3797', '6633', '7917']

Output: 72725


Input: Consider Input: ['1503', '3645', 'k', '6077', 'Z', 'a', '3435', '2255', '8303', '9481', '3237', '8125', 'p', 'q', 'Z', '4671']


Output: 50732