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.
6, 8, ['H', '5087', '6393', '5223', '2269', 'v', '7133', '1145', 'u', '8771', '6373', 'C', '6055', 'n', 'R', '3961', '49', 'b', 'a']