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, 18, ['c', 'v', 'z', '5045', '9647', '5921', '5431', 'e', 'X', '8959', '8439', '6305', 'W', 'a', 'G', 'C', '1339', 'Q']

1339