TASK 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.
PROBLEM: 6, 16, ['4469', '9515', 'z', '153', '123', '787', '3795', '1737', '6047', 'l', '165', 'C', 'p', '5221', 'M', '4149', 'L']

SOLUTION: 21901

PROBLEM: 7, 17, ['149', 'O', 'h', '7873', '9227', '5655', '8945', 'I', 'c', 'V', 'Z', 'I', 'L', '1153', 'L', 'Y', '2031', 'B', 'S', 'x', 'u', '2483', 'M', '2469', '4991']

SOLUTION: 12129

PROBLEM: 9, 10, ['U', 'e', 'Q', '5903', 'O', 's', 'R', '2233', '4399', '7321', 'I', 'O', 'B']

SOLUTION:
11720