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: ['2625', '1611', 'E', '4507', '3013', '1569', 'M', '2607', '1111', 'W']

SOLUTION: 17043

PROBLEM: ['8609', '8045', '2517', '3821', 'x', '3895', 't']

SOLUTION: 26887

PROBLEM: ['I', 'M', 'd', 'L', '6505', '1503', 'p', '1671', 'C', 'F', '7341', '6425', '1251']

SOLUTION:
24696