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: ['7973', 'J', '9035', 'H', '4051', '2661', 's', 'z', '8225', 'M', '4153']

SOLUTION: 36098

PROBLEM: ['8667', '4129', '7075', '6345', '1315', 'M', 'F', '9073']

SOLUTION: 36604

PROBLEM: ['1857', 'n', '1337', '1473', 'K', '4725', '8819', '4357', 'X', '957', 'x', '3783', 'd', '6185', '5919', 'C', '5617', '1125']

SOLUTION:
46154