500. Thought process was something like "there are a lot of 30s in the list, at least 3 groups of 3, so a really conservative estimate would be 300. But there a

500. Thought process was something like "there are a lot of 30s in the list, at least 3 groups of 3, so a really conservative estimate would be 300. But there are about that many boxes again having numbers in the double digits below 30. So, uh, let's go with 500."