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: ['h', '1157', 'm', '8975', '6165', '7491', '1855', '3489', '9629', '631', '9641']

SOLUTION: 49033

PROBLEM: ['V', '2633', '3269', 'r', 'Q', '3517', '2571', 'G', '4105', 'm', 'z', 'B', 'A']

SOLUTION: 16095

PROBLEM: ['a', 'x', 'u', 'P', '4845', 'q', 'W', 'a']

SOLUTION:
4845