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.
Q: 18, 21, ['8671', 'G', '4089', 'S', 'p', 'u', '5827', '217', '75', 'L', '67', '2943', '1455', '7665', 't', 'F', 'N', '5577', '5571', 'g', '4755']
A: 
15903