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, 5, ['b', 'u', '5279', '6945', '6631']

SOLUTION: 13576

PROBLEM: 6, 7, ['6947', 'l', 'd', '6531', 'X', 'l', '9741', '6553', '9905', 'n', 'Q', 'Y', '2063']

SOLUTION: 9741

PROBLEM: 5, 6, ['7815', 'A', '6641', '4621', 'c', '8153', 'w', '137', '8159']

SOLUTION:
8153