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, 15, ['r', '3527', 'Z', '9011', 'm', '879', '5305', '7153', 'c', '3567', 'd', '2319', 'M', 'y', '7703', '4899', 'G']

SOLUTION: 39464

PROBLEM: 3, 21, ['X', 'Z', '749', '5557', '9991', 'T', '3461', '335', 'I', 'J', '7113', 'b', '2683', '653', '3951', '4193', 'J', '7179', 'G', 'Y', '6151', '2873', 'X', '5619', '5151', '7689', '5605', 'o']

SOLUTION: 52016

PROBLEM: 5, 7, ['1997', '7309', '3909', '5871', 'Q', 'J', 'E', 'U', 'f', 'w', 'j', 'V', 'Z', '8989', 'f', '5217', 'z', 'P', '6079', '8067', 'G', '3501', 'B', '3719', '6111']

SOLUTION:
0