Look at all the squares that are divisible by 9, notice how they are always the same thing? That's because no matter what number you pick, after the little process it's divisible by 9.
Yep, no matter what it will be divisible by 9 so the same item will be in boxes 9,18,27,36,45 and so on. The chart of items changes up each round so that each time you play it'll be a different answer in those boxes.