It took me a bit to realize that people would think 105 taxed at 10% on the first 100 and 15% on the last 5 until I realized the idea is that people think that

It took me a bit to realize that people would think 105 taxed at 10% on the first 100 and 15% on the last 5 until I realized the idea is that people think that someone making 105 has the full 105 taxed at 15%.