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: 4, 9, ['k', 'N', 'd', '9345', '2971', 'Q', '917', 'X', '417', 'y', 'B', '6149', '9769', '9949', '2339', 'Q', 'A', 'r', '1059', 'c', 'U', 'p', '6951', 'Z', 'F', '7753', 'g']

SOLUTION: 13650

PROBLEM: 3, 4, ['6203', 'g', '471', 'j', 'o', '9679', 'M', '5459', 'y', '1929', '1649', 'C']

SOLUTION: 471

PROBLEM: 1, 9, ['7277', '2863', 'L', '1207', '3765', 'O', '7637', 'u', 'L', '3659', '397', 'L', 'n', 'j', '1627']

SOLUTION:
22749