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, 4, ['7815', '573', '8607', 'y', '6107', '9063', 'f']

SOLUTION: 9180

PROBLEM: 4, 17, ['n', 'U', 'b', '6139', '4187', '757', '2059', '5677', 'O', 'n', '73', 'F', '2573', 'K', 'I', '8921', '1483', 'C', '319', '7525', 'X', '3031', 'A', '6693', 'q', '549', 'N']

SOLUTION: 31869

PROBLEM: 1, 2, ['3105', 'i']

SOLUTION:
3105