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: 2, 8, ['3651', '6881', '3701', 'M', '8543', '5995', 'q', 'A', 'S', '745']

SOLUTION: 25120

PROBLEM: 8, 26, ['n', '9063', 'c', 'k', '7515', 'm', '2261', '4297', '9817', '7599', '1669', 'l', '9837', '3021', 'Q', '3991', 'r', 'B', '8615', 'J', '5641', '7637', '469', '3571', '2265', '3969']

SOLUTION: 72398

PROBLEM: 18, 21, ['J', 'z', 'w', 'K', 'Q', '6533', 'W', 'k', 'B', '5215', 'u', '2291', '1765', 'd', 'H', 'o', '3321', '2911', 'p', '4787', 'F', '3993', '4855', 'd', '4017', '5707', 'E', '45', 'n', '8963']

SOLUTION:
7698