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, 11, ['m', '455', 'u', 'C', 'b', 'N', 'A', 'W', 'M', '3811', 'K', '657', 's', '2839', 'E', 'E', '2733', '6733', 'c', 'P', 'V']

SOLUTION: 3811

PROBLEM: 5, 12, ['4439', 'P', 'e', '4929', '2085', 'w', 'C', '5385', '6517', 'w', '6257', '9721']

SOLUTION: 29965

PROBLEM: 4, 5, ['o', '9731', 'T', '8263', '65', 'I']

SOLUTION:
8328