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: 9, 12, ['6001', '6723', '1813', 'S', '3331', 'T', '297', '8105', '7529', 'f', '1459', '323', '8077', 'N', 'W', 'G', 's', 'z', '7559', 't', 'F', 'h', '3771', '975']

SOLUTION: 9311

PROBLEM: 15, 21, ['w', 'R', '9247', '5745', '5397', 'U', 'R', 'e', '8067', 'e', '2851', 'O', 'F', '4705', '5393', 'q', 'b', 'J', '211', '4319', 'o', 'h', 'Z', '4423', 'j', '2691', 'U']

SOLUTION: 9923

PROBLEM: 12, 17, ['6941', 'Z', '5123', 'v', '9673', '7829', '1559', '855', 't', 'e', 'G', '1861', 'H', 'g', '25', '1465', 'W', 'R', 'P', '2731']

SOLUTION:
3351