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: 6, 6, ['I', '8721', '6901', '737', '5767', '9771', 'h']

SOLUTION: 9771

PROBLEM: 4, 4, ['Y', 'X', 'r', '439', 'D', 'H', '1903']

SOLUTION: 439

PROBLEM: 7, 10, ['a', 'm', 'N', 'E', 'v', '4745', '7561', '9003', '2945', '3451', 'D']

SOLUTION:
22960