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: 3, 19, ['4723', 'r', 'b', 'I', '7639', 'x', 'j', '1697', '8525', '4083', 'i', '1337', 'Q', '3705', '4229', 'L', '3721', 'g', '2569', 'j', '447', '2421', '9513', 'p', '6663']

SOLUTION: 37505

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: 16, 23, ['N', '3357', '919', '9963', 'u', '137', '5633', '2999', 't', '1583', '2217', 'p', '1087', '7219', '61', 'p', 'L', '5745', '4431', 'T', '4369', 'G', '1511', 'p', 'M', '4277', '6683', 'C', 'D']

SOLUTION:
16056