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, 18, ['b', 'K', 'Z', '8757', '691', '8915', 'l', '2819', '9599', '4149', '8791', '7815', '7211', '1973', 'w', '5557', '1071', '2483', '9851', 'x', '5441', '2787', '3723', '5981', 'o', '1045', 'z']

SOLUTION: 69831

PROBLEM: 1, 14, ['T', 'y', 'L', 'l', '5307', 'j', '2235', '9617', 'e', '7687', 't', '4357', '1745', 'X', '8485', 'a', '1387', '1351', '6437', 'u']

SOLUTION: 30948

PROBLEM: 6, 11, ['u', '5945', '2613', '131', '8105', '8765', 'D', 'Z', 'X', 'e', 'A', 'i', 'K', 'R']

SOLUTION:
8765