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, ['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: 8, 9, ['P', 'V', '5567', 'm', 'V', '9533', '2381', '1095', '835', 'B', 'z', 'J', 'H', 't', 'b', 'z', 'e']

SOLUTION: 1930

PROBLEM: 4, 28, ['h', '3551', '7295', '8499', '2667', 'v', '1177', '6209', '3431', '683', '957', 'c', 'Q', 'v', 'e', '9027', 'O', 'h', 'k', 'X', '9117', 'y', 'M', 'E', 'D', '1791', '1243', '9825', 'K', '1753']

SOLUTION:
54626