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, 3, ['f', 'C', 'f', 'V', 't', 'x']

SOLUTION: 0

PROBLEM: 9, 10, ['8997', 'P', '2065', 'F', '2531', 'o', 'a', '3057', '7393', '2665', '4563']

SOLUTION: 10058

PROBLEM: 5, 8, ['T', 'w', '3075', 'Y', '6739', '5637', '3489', 'M', 'o', '1405', '3577', '7363', '8597', 'x', 'o', '1611', '337', 'C', '9579', '4421', '8693', '2145', '6429', 'K', 'J', '6285', '6107', '1851']

SOLUTION:
15865