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: ['n', 'm', 'Y', 'v']

SOLUTION: 0

PROBLEM: ['2039', '1679', '9675', 'S', 'J', '2069', 'r', 'e']

SOLUTION: 15462

PROBLEM: ['2593', '9221', 'G', '7213', '1331', 'W', '747', 'u', 'j', 'a', 'A', '6149', '4445', 'D', '1245']

SOLUTION:
32944