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: 7, 12, ['v', 'g', '6637', '7673', 'n', 'F', 'X', '7835', 'C', '2457', '9521', 'W', '4555', 'u', '2373', '6097', '9359', 'k', 'n', '8621']

19813