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: ['7771', 'g']

SOLUTION: 7771

PROBLEM: ['e', 'K', 'A', 'V', '1169', 'n', '8729', 'V']

SOLUTION:
9898