TASK DEFINITION: In this task, you are given inputs i,j, and A, where i and j are integers and A is a list. You need to return the sum of all the numerical elements in the list A between the positions i and j (including positions i and j). Return 0 if no numerical element is present in the list between the given ranges. i and j will be non-negative, and will always have a value less than the length of A. i will always be less than j.
PROBLEM: 5, 11, ['9535', 'L', '5957', 'm', 'B', 'W', '2105', '4959', 'f', '395', 'a', 'W', 'C']

SOLUTION: 7459

PROBLEM: 3, 6, ['d', 'v', 'd', '5043', '8989', 'w', 'Y']

SOLUTION: 14032

PROBLEM: 6, 8, ['G', '2053', '6155', '9643', 'g', '1907', 'K', '5535', 'O', '5911', 'y']

SOLUTION:
7442