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: 5, 7, ['t', 'e', 'P', 'H', 'I', 'U', 'a', '8147', 'i', 'D', 'x', 'x', 'i', 'm', '4893', '6443', '8841', 't', '4641', '9415', '1965', '673']

SOLUTION: 0

PROBLEM: 9, 21, ['Z', 'Z', '853', '8745', 'L', '4401', 'a', 'L', '8237', 'h', '9163', '1891', '5049', '7075', '1437', '7377', 'E', 't', '837', 'B', 'z', '5629', 'm', 'z', '365', 'M', '8877', '27']

SOLUTION: 41066

PROBLEM: 12, 14, ['9645', '6833', 'D', '1037', '2229', '8415', '7739', '4933', '239', '4925', 'v', 'Q', '6519', 'S', '7373']

SOLUTION:
6519