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: ['D', '5207', 'E', '119', 'g', '2991', 'G', 'g', 'u']

SOLUTION: 8317

PROBLEM: ['9045', '4953', '8727', 'A', 'n', 'v', '4667', 'x', 'i', '161', '5715', '6651', '3159', '4621', 'u', '2441', 'T', '4031', '2291', 'f']

SOLUTION:
56462