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: ['A', '9979', '8723', '1131', 'i', 'p', 'M']

SOLUTION: 19833

PROBLEM: ['2179', 'L', 'S', 'k', 'a', 'J', '4357', 'M', '1', 'c', '1193', 'x', '5419', '9503', 'T', 'Q', 'v']

SOLUTION:
22652