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: ['O', 'K', 's', 'V', '6815', 'c', '9277', 'V', '1783', 'b', 'i', '2045', 'E', 'E', '2035']

SOLUTION: 21955

PROBLEM: ['W', '3629', '6053', '1035', '1717', 'n', 'y', '9585', 'D', '5125', 's', '9801', '2905', 'E', '5797', 'T']

SOLUTION: 45647

PROBLEM: ['z', 'U', '2251', '4335', 'n', 'O', '4075', '5299', 'd', '95', '3111', 'J', '6317', 'O', 'S', 'j', '5615', '6379', 'C']

SOLUTION:
37477