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

SOLUTION: 45647

PROBLEM: ['Y', 'X']

SOLUTION: 0

PROBLEM: ['9461', 'c', '9203']

SOLUTION:
18664