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: ['i', 'o', '5363', '5937', 'x', '6705', 'w', '5495', 'E', '9823', 'F', '83', '8443', '5223']

SOLUTION: 47072

PROBLEM: ['843', 'x', 'A', 'k', 'D', '3493', 'w', '7259', 'W', 'R', '7765', 'z', '8963', 'W']

SOLUTION:
28323