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: ['6645', 'k', '4879', 'N', '113', 'L', 'x', '8365', 'v', 'A']

SOLUTION: 20002

PROBLEM: ['1869', 'q', '5919', 'D', '7733', '2641', 'h', '1327']

SOLUTION: 19489

PROBLEM: ['7649', 'a', 'S', '8301', '5937', 'H', 'H', 'j']

SOLUTION:
21887