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: ['4529', '7465', 'S', 'Z', 'v', 'w', '5791', '3363', '2643']

Output: 23791


Input: Consider Input: ['2175', '4539', 'L', 'T', 'q', '2407', 'F', 'V', 'b', '9475', '2279', '4469', '6231']

Output: 31575


Input: Consider Input: ['4977', '7695', 'C', '5893', 'K', 'j', '3795', 'M', 'T', 'r', 'K', 'F', 'y', 'T', 'u', '461', 'R']


Output: 22821