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, 8, ['x', 's', '1415', '6003', '2237', 'g', 'l', 'a', 'l', 'y', 'y', '4651', 'e', 'D', 'g']

SOLUTION: 0

PROBLEM: 5, 12, ['1699', '6521', '1705', '8871', 'C', '8963', '8657', 'E', '2693', 'e', 'S', 'a', 'M', '289', '6037', '2663', 'w', 'e', 'X', '2973', 'j', 'f', '1609', '2759', 'P', 'l', 'k', '4463']

SOLUTION: 20313

PROBLEM: 2, 2, ['8077', '1003']

SOLUTION:
1003