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, 10, ['7435', 'B', '7841', '5901', 'I', '6255', 'g', 'F', 'D', '1839', '3651', 'Q', '1629', 'T', '3423', 'y', '9597', '8453', '8541', 'a', '357', 'k', 'P']

SOLUTION: 8094

PROBLEM: 5, 16, ['a', '2439', 'p', '6759', 'z', '2233', 'q', '1447', 'Y', 'k', 'Y', 'Y', '4489', 'N', '5251', '5367']

SOLUTION: 18787

PROBLEM: 14, 19, ['B', 'v', 'c', '4693', 'K', 'z', '1453', 'E', '2217', 'V', '2049', '2013', '8541', '7915', 'H', 'p', '2529', '3311', '9943']

SOLUTION:
23698