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, 27, ['O', '4985', '525', 'U', 'B', '4689', 'u', '2891', 'A', 'O', 'u', 'T', 'Z', '81', '9747', 'O', '2135', 'U', '8637', '3927', 'X', 'z', 'W', 'h', '6347', 'L', 'c', 'H', 'q']

SOLUTION: 38454

PROBLEM: 14, 15, ['Q', '2131', 'X', 'u', 'y', '9699', '7305', '3017', '8151', 'X', '9723', '7907', 'j', '1527', 'u', 'D', 'b', '7735', '1713']

SOLUTION: 1527

PROBLEM: 8, 12, ['v', 'C', 'y', '8319', '2001', 'g', 'p', 'u', 'J', 'c', '4647', '8749', '7861', '2791']

SOLUTION:
13396