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: 5, 6, ['6675', '1045', '5697', '8385', 'R', '8979', '2187', 'L', 'w', '9711', 'e', '9789', 'f', 'c', 'C', '8189', '131', '8163']

SOLUTION: 8979

PROBLEM: 1, 3, ['F', 'N', 'N', 'r', 'X', 'R', '3477', 'T', 'z', 'v', 'B', 'Q']

SOLUTION: 0

PROBLEM: 4, 14, ['99', 'F', '1297', '7085', 'u', 'w', 'w', '3803', 'F', 'D', 'F', 'L', '5967', '3545', 'E']

SOLUTION:
20400