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: 5, 6, ['6947', '1131', '3091', '6973', 'y', '7807', '8921', 'D', '1263', 'm', '5007', 'R', 'o', 'S', 'p', 'q', '5333', '8027', '7911', '4753']

7807