You all missed the whole point.
Why not just put it in a category which can't be seen by end-users regardless of how well they can or cannot put two and two together.
Here's an example....
Timmy's Electric Company googles wraps for vehicles.... goes on to shops producing.... then goes to pricing and so on. He finds out that his truck will take 385 S.F. of laminated vinyl through talking with shop owners. He now has an edge because you guys are discussing openly what those prices are showing exactly where to get it and how much the various rolls cost you.... and I'm sure he can do a little math and figure out how much of a roll 54" x 50 yards will yield and then you're going to have to justify your prices and mark up to an end-user who has more inside knowledge than he should. It just kinda puts you in a tough spot, that's all.
I know it's sounds like a little trouble on an end-user's part, but everyone is always looking for a little extra help. Why give 'em this ??
However, if you guys don't mind telling someone what these numbers are.... do you have your costs to everything posted around your shop so your customers know up front what you're doing ??
C'mon, I'm not being difficult here, Why would anyone discuss this kinda stuff in a completely open area ??And then want to defend doing so ??