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: ['z', '9173', 's', '8937', 'h', '1881', '7929', 'b', '2441']

SOLUTION: 30361

PROBLEM: ['L', 'i', '9225', 'w', '5365', '8077', '2733', 'W', '8493', 'B']

SOLUTION: 33893

PROBLEM: ['c', '5709', 'M', 'B', 'D', 'a', 'e', '5251', 'r', '5911', '3327', 'B', '7191', '7107', 'J', '7257', '4531', '5507', '6617', '3429']

SOLUTION:
61837