DCBS Codes, i.e. (C: 0-1-2)?

I've been ordering from them for years and have never been able to figure out what these codes mean. It'll be in the title of the comic/trade [[I]Neil Gaimans Lady Justice TP Vol 02 (C: 0-0-1)[/I]].

Does anyone know? I feel like is one of those obvious things that's just going right over my head.

DCBS and TFAW ( as well as others) pull their listings from a Diamond Database. The Code (C:0-0-1) is for Diamond purposes.