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: 3, 7, ['k', 'm', 'W', '641', 'X', 'B', '897']

SOLUTION: 1538

PROBLEM: 1, 10, ['9139', 'F', 'e', 'F', '8979', '831', '6811', '3677', '2937', '1001']

SOLUTION: 33375

PROBLEM: 2, 17, ['4057', '6507', 'r', '4193', 'C', 'H', '5721', 's', '1153', 'F', 'x', 'O', '7475', 'f', '3477', 'a', 'Y', '3543', '1561', '8097', '7665', 'f', '2497', 'o', '9179', 'T', 'g']

SOLUTION:
28526