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, 5, ['7639', '7477', '2545', '6847', 'N', 'H']

SOLUTION: 9392

PROBLEM: 5, 15, ['5049', '2581', '4617', 'b', 'c', 'z', '8247', 'd', '1413', '7797', 'K', 'T', '9009', 'V', '5179', '1643', '3923', '4885', 'j', '6717', 'D', 'D', 'O', '5777', 'W', 'J', '6267', 'e']

SOLUTION: 31645

PROBLEM: 2, 3, ['175', '9145', 't', '1509']

SOLUTION:
9145