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: ['6629', 'o', 'e', '497', '4865', '8733', '5733', '7337', 'N']

SOLUTION: 33794

PROBLEM: ['D', '5207', 'E', '119', 'g', '2991', 'G', 'g', 'u']

SOLUTION: 8317

PROBLEM: ['i', '9141']

SOLUTION:
9141