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, 8, ['V', 'd', 'c', '9255', 'A', '2017', '4525', '4237']

SOLUTION: 20034

PROBLEM: 18, 24, ['3493', 'T', '2499', 'l', '543', 'Y', '2247', '2665', 'y', 'z', 'a', 'H', '1057', '2401', '5587', 'w', 'N', 'n', 's', 'H', 'u', 'N', '757', 'u', 'R']

SOLUTION: 757

PROBLEM: 6, 16, ['7289', '3543', '6879', 'q', '8125', '9055', 'A', '3761', '2433', '791', '8215', 's', '4549', 'o', 'b', 'W', 'z']

SOLUTION:
28804