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: ['b', 'O', '7023', 'q', '2667', '681', 'C', '5707', '7125', 'q', 'Q', '1375', '8869', '6709']

SOLUTION: 40156

PROBLEM: ['m', 'g', '7251', '5873', '59', '7345']

SOLUTION: 20528

PROBLEM: ['817', 'p', '3663', '5897', '2255', 'd', '5623', '2667', '4383', 'J']

SOLUTION:
25305