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: ['z', '9173', 's', '8937', 'h', '1881', '7929', 'b', '2441']

SOLUTION: 30361

PROBLEM: ['x', '9895', 'r', 'H', 'C']

SOLUTION: 9895

PROBLEM: ['205', 'T', '5029', 'm', 'w', '6811']

SOLUTION:
12045