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: ['8361', '6757', '5341', '2597', '9803', 'a', 'd', '5889', '9823', 'd', '7947', 'y', 'p']

SOLUTION: 56518

PROBLEM: ['W', 'O', 'c', 'r', 'E', 'w', '9811', '6421', '3543', '4293', '8255', 't', '229', '745', 'w', 'p', '6861', '5305', 'h']

SOLUTION: 45463

PROBLEM: ['2363', 'l', 'E', 'K', 'e', '1889', '1707', 'w', '995', '2751', 'j', '8143', 'l']

SOLUTION:
17848