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, ['t', '9215', 'K', 'Q', 'w']

SOLUTION: 0

PROBLEM: 3, 7, ['1687', '1929', '3189', '3277', 'L', 'b', 'x', '3181', 'C', 'w', 'A', 't', 'I', '3421']

SOLUTION: 6466

PROBLEM: 1, 4, ['i', '9103', 'p', '1539', 'A', '7931', 'Z', '2199', '7537', '7161', '5593', '797']

SOLUTION:
10642