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: ['x', 'V', 'g', '5469', 'c', '7873', 'T', 'p', '8109', '5395', 'h', 'z', 'T', '9373']

SOLUTION: 36219

PROBLEM: ['Q', '6383', 'P', '8455', '3881', '5821', 'e', 'v', '1421', 'Q', '6377', '3157', '6407', 'q']

SOLUTION: 41902

PROBLEM: ['V', '1595', 'o', '4925', '7743', 'j', '2693', 'n', 'R', 'z', 'n', 'z', 'g', '9773', 'G']

SOLUTION:
26729