TASK DEFINITION: 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.
PROBLEM: ['6565', 'T', 'O', '2901', '5121', 'y', '9617', 't', '7825']

SOLUTION: 32029

PROBLEM: ['w', 'I', 't', '813', 'K', '5785']

SOLUTION: 6598

PROBLEM: ['3947', '797', '8855', 'w', '1541', 'l', 'a', '1643', '7857', '1625', 'O', 'G']

SOLUTION:
26265