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: 1, 6, ['3309', 'w', '1143', 'D', 'Z', 'd']

SOLUTION: 4452

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: 4, 11, ['W', 'K', 'J', '4661', 'n', 'D', '6773', '4623', '7683', '6037', 'w', '6443', 'W', '6923', 'e', 'y', '3931', '8727', '4581', '4725', '9979', 'r', 'j']

SOLUTION:
29777