So, for example, if a candy bar has a retail price of 0.44, it might have a cost code of HL, indicating that Longs Drugs pays 0.25 for it.Link (via Waxy)
The Longs Drugs Price code appears in the middle of many of their on-shelf pricetags. It is two, three or four letters.
Here, the ANT stands for 308, meaning that the Longs Store paid $3.08 for the M&Ms, and will make 91 on the retail sale.
Update: Jack sez, "It might also be interesting to note that Walgreens uses a similar system, except with the word BRUSHCLEAN B1 R2 U3 S4 H5 C6 L7 E8 A9 N0"
I write books. My latest is a YA science fiction novel called Homeland (it's the sequel to Little Brother). More books: Rapture of the Nerds (a novel, with Charlie Stross); With a Little Help (short stories); and The Great Big Beautiful Tomorrow (novella and nonfic). I speak all over the place and I tweet and tumble, too.