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: ['D', 'R', 'Y', '4929', 'P', '7929']

Output: 12858


Input: Consider Input: ['6815', 'A', '1055', '4687', '8675', '4615', 'a', '2127', 'w', 'l', 'J', '5025', 'c', 't', '9727', 'G', '8431']

Output: 51157


Input: Consider Input: ['8419', '2625', '4277', 'H', 'G', 'e', 'n', 'x', '45']


Output: 15366