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: ['a', 'q', '4085', '6327', '6869', 'Z', 't', '7057', '1965', 'p', 'o']

SOLUTION: 26303

PROBLEM: ['o', 'O', 'H', '7619', '6435', 'X', 'g', '1663']

SOLUTION: 15717

PROBLEM: ['V', '3025', 'X', '473', 'V', 'G', '7641', '6109', 'L', 'b', '4265', 'Z', 'U', '8567', 't', 'c', '5135']

SOLUTION:
35215