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: 6, 27, ['O', '4985', '525', 'U', 'B', '4689', 'u', '2891', 'A', 'O', 'u', 'T', 'Z', '81', '9747', 'O', '2135', 'U', '8637', '3927', 'X', 'z', 'W', 'h', '6347', 'L', 'c', 'H', 'q']

SOLUTION: 38454

PROBLEM: 1, 5, ['O', '4521', 'w', '6745', 'W', '7743', '4113', '7179', '9751', '2365', '9161', 'j', '1339', '6927']

SOLUTION: 11266

PROBLEM: 3, 3, ['m', 'C', '6837']

SOLUTION:
6837