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: 7, 12, ['K', '5995', '5183', '67', '563', '9143', 'M', 'H', '2923', '1825', 'y', '373', 'm', 'w', 'x']

SOLUTION: 5121

PROBLEM: 3, 20, ['u', '5631', '6297', 's', '5839', 'l', '6967', '4097', '4643', '9645', 'q', 'i', '2963', 'R', '9539', 'j', 'M', '5607', '2651', '907', 'z', 'C', 'O']

SOLUTION: 59155

PROBLEM: 3, 8, ['h', '9203', 'o', '2501', '9001', '8887', '9293', '2279', '7441', '7337', 'm', '8905', '8827']

SOLUTION:
31961