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: 1, 14, ['n', 'v', '7825', '5951', 'k', '1733', 'c', 'u', 'C', 'c', 'D', 'g', '9231', 'G']

SOLUTION: 24740

PROBLEM: 16, 17, ['Z', '8799', 'Z', 'P', '3413', 'X', '939', 's', 'G', 'x', '6911', 'v', '1183', '3507', 'r', 'C', 'k', 'Z', '4247']

SOLUTION: 0

PROBLEM: 2, 12, ['8853', 'a', 'T', '149', '477', 'l', '8905', 'L', 'a', '1613', '3965', '7159', '1241', '7393', '3859', '1329', '5369']

SOLUTION:
22268