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: 13, 16, ['2629', '751', 'p', '6045', '3899', '7193', 'E', '2279', 'h', 'B', 'm', 'S', 'M', 'n', '6421', 'U', 'B', '9285', '7107']

6421