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: 20, 21, ['3975', '2459', 'X', '337', 'X', '5453', '9019', 'O', '4911', '1019', 'y', 'D', 'K', 'W', 'v', '2479', 'a', 'o', '4867', '9195', '3269']

SOLUTION: 12464

PROBLEM: 2, 11, ['8237', '8149', '7077', '2199', '7839', 'c', 'j', 'Y', '845', '2273', 'n', 'Q']

SOLUTION: 28382

PROBLEM: 6, 7, ['W', 'g', 'B', '6291', 'k', 'u', 'u', '5057', '9057', 'R']

SOLUTION:
0