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: 4, 12, ['2337', 'A', 'j', 'p', 'c', 'k', 'Y', 'Q', 'N', 'L', '8857', '9985', 'N', 'x', 'u']

SOLUTION: 18842

PROBLEM: 2, 2, ['V', 'a']

SOLUTION: 0

PROBLEM: 5, 15, ['9407', 'v', 'r', '3133', 'u', 'y', 'A', 'f', 'l', 't', '7843', 'd', 'x', '4007', 'T', 'R']

SOLUTION:
11850