Interesting Math in Tigerdirect Flyer

As usual I’m checking out a flyer. I order from them
frequently. It starts off normal, bellowing “Price Drops

Quite the rip off on the 500GB disk there, trying to dump old stock I guess. But I digress, they do often have amazing deals. So I’m looking through it as usual and some memory catches my eye as I have a box that could use old DDR400. The price is pretty good and I start debating an order. Then I noticed something funny about this particular price drop: