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: ['9989', 'B', 'E', '5181']

SOLUTION: 15170

PROBLEM: ['7293', '2619', '2459', '3829', 'J', 'c', 'a', 'a', '311', 'x', 'r', '6123', '2847', '4809']

SOLUTION:
30290