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: ['6551', 'm', '3941', 'F', 'K', 'u', '7981', '9581', 'X', 'M', 'N', 'e', 'G', 'i']

SOLUTION: 28054

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

SOLUTION: 33794

PROBLEM: ['4533', 'D', '823', 'a', 'x', 'p', '9787', '2587', 'T', 'Z', '2207', '8719', 'F', '7675', 'T', '2777', '203', 'N', 'o']

SOLUTION:
39311