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: 3, 15, ['i', '3795', '7239', '6365', 'i', '4003', 'v', '6905', '9227', 'u', 'e', '5621', 'M', '7481', '4721', 'I', 'e', 'o', 'K', 'f']

SOLUTION: 51562

PROBLEM: 15, 23, ['z', '4587', '8709', '977', 'J', '823', '6437', '3817', 'X', '399', '2265', '3001', '5997', '3393', 'o', '6551', '7305', '9007', '7931', '8235', 'k', 'l', '1523']

SOLUTION: 40552

PROBLEM: 1, 2, ['l', '103', '8401', 'r']

SOLUTION:
103