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, 4, ['H', 'V', 'w', '4621', 'C', '3763', '1271', '967']

SOLUTION: 4621

PROBLEM: 2, 3, ['o', 'p', '4765', 'u', '629', 'p']

SOLUTION: 4765

PROBLEM: 5, 16, ['a', '2439', 'p', '6759', 'z', '2233', 'q', '1447', 'Y', 'k', 'Y', 'Y', '4489', 'N', '5251', '5367']

SOLUTION:
18787