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, 4, ['1809', '1127', 'm', '3137']

SOLUTION: 3137

PROBLEM: 3, 18, ['5593', '9147', 'F', 'O', '3355', '4669', 'j', '8117', 'I', '6935', 'x', 'Z', 'q', '8919', 'F', 'j', 'z', '215', '1761', 'y', '9889', '5557', 'p', 'm', '9293', '4673', 'X', '9519', '6099']

SOLUTION: 32210

PROBLEM: 4, 8, ['r', 'Z', '2449', '6473', 'Q', 'B', 'J', 'P']

SOLUTION:
6473