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, 22, ['B', 'I', '5423', '9395', '6733', '8815', 'A', 'o', '3809', '7385', 'z', 'Y', 'r', 'b', '903', 'k', '5975', '6687', 'K', '3971', 'r', '9579', 'F', '3705', 'X', 'E', '6071', '8277', '5397']

SOLUTION: 63252

PROBLEM: 1, 15, ['p', 'N', '7935', '1649', '1509', 'N', 'q', 'L', '1917', '9753', 'C', '6387', '4037', 'D', '1099', '5329', '1703', '7715', 'c']

SOLUTION: 34286

PROBLEM: 3, 9, ['i', 'g', 'K', 'L', '9159', 'u', 'O', 'n', 'C', '3323']

SOLUTION:
9159