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: ['8609', '8045', '2517', '3821', 'x', '3895', 't']

Output: 26887


Input: Consider Input: ['z', '447', '9781', 'R', '6083', 'u', '9229', 'Z', 'F', '2437', '9677', 'n', 'G', '6763', '5883', 'B', '9563', '4575']

Output: 64438


Input: Consider Input: ['4525', '5349', 'e', 't']


Output: 9874