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: ['5289', '1701', '5925', '7973', 'F', 'V', 'y', '5903', 'i']

SOLUTION: 26791

PROBLEM: ['h', 'a', '1645', '2391', '759', '519', '3331', '2831', '3427', '9893', 'u', 'J', '7391', '8379', 'V']

SOLUTION: 40566

PROBLEM: ['8229', '5227', 'C', '1589', 'v', 'f', '437', 'J']

SOLUTION:
15482