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: ['e', 'K', 'A', 'V', '1169', 'n', '8729', 'V']

SOLUTION: 9898

PROBLEM: ['187', 'J', 'l', 'p', '1009', 'g', '5817', 'V', 'B', 'Z', '3329', '9253']

SOLUTION: 19595

PROBLEM: ['6155', '783', '3725', 'L', 'Y', 'U', 'u', '5635', '1967', '4851', '1251', '9773', 'K', '1391', 'p', '5035', '6405', '5041', 'h']

SOLUTION:
52012