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: ['V', 'O', '1309', 'm', '9333', '8283', 'Z', 'K', 'X', 'w', '9855', '9075', '2013', '8485', '9973', '8779']

SOLUTION: 67105

PROBLEM: ['8739', 'K']

SOLUTION: 8739

PROBLEM: ['939', 'g', 'r', 'i', '9659', '3049', 'r', 'V', 'a', '941', '681', 'c', '8293', 'z', 'p', '7811', 'o', '6265']

SOLUTION:
37638