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.
Input: 15, 15, ['W', '645', 'u', '3837', '5981', '9159', 'H', '6875', 'm', 'N', '2533', '2969', '3337', '1695', '7811', 'z', 'w']

7811