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: 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

PROBLEM: 1, 3, ['5437', '8521', '9081', 'h', '5453', '5065', '2949', 'P', 'Q', '2853', '7857', 'l', '5217', 'O', 'V', '3585', 't', '2593', 'V']

SOLUTION: 23039

PROBLEM: 2, 6, ['S', '3409', 'C', 'k', '4793', 'U', '2981', 'E', 'Q', 'W']

SOLUTION:
8202