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: ['u', 'i', 'z', 't', '9617', 'd', '3255', 'w', 'S', '3041', '7451']

SOLUTION: 23364

PROBLEM: ['7277', 'c', '9587', '2613', '853', 'w', 'y', '4067', 'o', 'u', 'j', 'W', '1517', 'x', 'Y']

SOLUTION: 25914

PROBLEM: ['X', 'l', '4835', '4505', 'p', '7249', 'b', 'L', '1823', '2623', '9691', 'z', '3537', '1765']

SOLUTION:
36028