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: ['7087', 'P', 'i', 'e', '4875', 'e', 'F']

SOLUTION: 11962

PROBLEM: ['i', 'C', '5373', '2017', 'm', '5435', 'Y', 'h']

SOLUTION: 12825

PROBLEM: ['H', '2511', '2827', 'q', '9857', 'A', 'q', '9669', '419', 'l', 'V', 'D']

SOLUTION:
25283