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, 2, ['M', '3453', '5733', '2337', '9975', '1827', 't', '4937']

SOLUTION: 3453

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: 15, 17, ['C', '1753', 'u', 'P', 'M', 'B', 'E', '1905', 'w', 's', 'K', 'L', 'H', '3305', '6077', 'l', '5661', '6975', 'B', '4489', '9339', 'E', '5969', 'I', 'E']

SOLUTION:
11738