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: 3, 16, ['T', 'v', '2985', 'F', '8921', 'M', 'F', '4243', 'k', 'x', '435', 'B', '3335', '7613', 'M', '7809', 'q', '4147', 'h', '7523', 'R', '7589', '8795', 'O', 'L', '3371']

SOLUTION: 35341

PROBLEM: 9, 13, ['6195', 'k', '6835', 'u', '4049', '3063', 'N', 'q', 'R', 'Y', '8573', 'r', '2037', 'w', 'D', 'Y', '9849', 'T', '2245', '6999']

SOLUTION: 10610

PROBLEM: 15, 26, ['q', 'A', 'C', '6009', 'X', 'C', '6473', '6983', '5083', '9499', 'y', '5299', 'u', '3037', 'D', 'S', '7729', '999', '5179', '5449', '4867', 'l', 'b', 'Y', 'u', '7681', '1015', 'O', '551', 'D']

SOLUTION:
31904