Thank you, thank you, GayR! My sister just explained that system to me at Xmas (she
works in a Bueler's grocery store in Medina, Ohio) and I forgot to write it down B4 she left our house. I was musing a couple days ago about what exactly those numbers meant as I'd forgotten how she explained things. You have posted the precise explanation so I'm printing it to save--no more relying on my not-so-good memory!