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: 2, 8, ['6901', '3901', '5101', '4297', '1099', 'q', 'z', '6615', 'z', '6859']

SOLUTION: 21013

PROBLEM: 2, 8, ['4517', 'w', '9145', '5477', '7679', 'j', '8603', 'z']

SOLUTION: 30904

PROBLEM: 7, 7, ['w', 'g', 'T', 'e', 'z', '8135', '6535', '3783', '1647', '9947', 'F', '9255', 'w', 'B', '6857', '8515', 'F', 'i', 'T', '5201', '5335', 'g', '3327', '6487', 'K', '9095', 'T', 'y', '849']

SOLUTION:
6535