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: ['b', '5447', 'R', '8489', 'L', '627', 'P', '7491', 'c', 'c', 'r', '6923', '1167']

SOLUTION: 30144

PROBLEM: ['Y', 'v', '1331', '5647', '1943', 'c', 'V', '5967', '9215', '7627', '1097']

SOLUTION:
32827