[andrew_]

I grew up in a piping wholesale business in the midwest that's still going after 35 years. Orders could be ea. (each, single part) or cs. (case, which is arbitrary based on supplier). That industry is never arbitrary unit (e.g. per "units")because the suppliers sell in bulk and piecemeal, and buyers all have their own specs for how they order.

So I can confirm that at least one other wholesale market is indeed different.

[LanceH]

I've seen the same with snack foods. Never saw "unit". A single was an each and it would be said like, "$2 per each" rather than most people would say, "$2 each". I can't remember what the bundle name was case...or something, but it wasn't unit.