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, 5, ['5713', 'f', 'g', '9979', '2651', 't', '6513', 'v', '5733', '3325', 'M', 'B', '6139', 'n', 'K', 'h', 'c', '1181', '1263', '6625', 'F', '7059', 'c', '4083', 'i', 'g', '6783']

SOLUTION: 12630

PROBLEM: 4, 12, ['f', '3507', 'T', 's', '9209', 'T', 'o', '769', 'U', 'i', 'V', '5723', '2151', 't', 'Z', '5857', '951', '3261', 'd', '407', 'X', '1869', '1483', '3631', '2949']

SOLUTION: 15701

PROBLEM: 1, 3, ['427', '8039', '9807']

SOLUTION:
18273