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: ['q', 't', '4837', 'F', '2367', '1867', '8361', 'm']

SOLUTION: 17432

PROBLEM: ['4749', '1169', '4273', 'X']

SOLUTION: 10191

PROBLEM: ['2615', 'i', 'E', 'w', '3803', 'D', 'r', '6897', '2655', '9945', '1573']

SOLUTION:
27488