You know those volume discounts that some jewelry supply places give? Well, they get me every time. I swear that I'm just going to order what I really need, I am not going to pay any attention to the little counter that says, "Buy x more and save x dollars!"
I just did it again. How can I not? I entered my order and took note of the total; and then I added enough stuff to bring me to the next "volume discount" level. That total was lower than my original total! And I'm getting more stuff!
Hmmm, I wonder what happens if I go to the next level?