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: 1, 3, ['b', '3997', '285', 'T']

SOLUTION: 4282

PROBLEM: 1, 2, ['f', '1589', '6339']

SOLUTION:
1589