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: ['2913', 'b', 'j', '7591', 'O', 's', '5589', '4995', '7503', 'U', 'S', 'C', '6797']

Output: 35388


Input: Consider Input: ['2225', '1925']

Output: 4150


Input: Consider Input: ['H', '6707', '7193', 'H']


Output: 13900