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: 2, 10, ['f', 'r', 'Z', '1989', '5035', '1623', '9335', '7495', '8663', '2199', '2047', 'o']

SOLUTION: 36339

PROBLEM: 6, 13, ['x', '8293', 'W', 'O', '511', 'y', '9801', '7925', '3353', 'J', 'D', 'J', 'B', '2559', 'j']

SOLUTION: 21079

PROBLEM: 1, 1, ['4565', '4129', 'J']

SOLUTION:
4565