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, 6, ['4301', 'a', 'E', '3709', '5105', 'B']

SOLUTION: 8814

PROBLEM: 16, 20, ['8615', '8269', 'k', 'R', 'l', '9823', '6879', '7777', 'w', '8443', 'W', '6951', 'Q', '8251', 'M', 'g', 'F', 'w', 'C', '7267', 's', '973', '4703', '8921']

SOLUTION: 7267

PROBLEM: 1, 5, ['5057', 'Z', 'a', '4561', '225', '6921', 'T', '4033', '1259', '9805', 'l', '5641']

SOLUTION:
9843