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: ['2585', '3043', 'w', '7697', '53', 't', 'A']

SOLUTION: 13378

PROBLEM: ['6001', '6423', '5591', '8721', 't', 'x', '3723', 'E', 'F', '7353', 'b']

SOLUTION: 37812

PROBLEM: ['5353', '6705', '1455', '5329', 'e', '6741', '2567', 't', '1635']

SOLUTION:
29785