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: 15, 20, ['o', '7647', 'E', '5963', 'Y', 'B', 'F', 'v', '9553', 'h', 'B', 'L', '8709', '5253', '9337', 'r', '6107', '3099', '8217', '7597', '9571', '5453', '8367']

SOLUTION: 34357

PROBLEM: 9, 17, ['9485', '5729', 'N', 'v', 'H', 'j', 'K', 'D', 'R', '2515', 'O', '2001', '9877', 'p', 'Y', '8407', '647']

SOLUTION: 23447

PROBLEM: 7, 7, ['999', '257', 'a', 'y', '1495', 'a', '3623', '8393', 'X', '121', '5395']

SOLUTION:
3623