We have that in supermarkets in the northeastern US. It's great about half the time. The other half, they make you bust out the calculator unless you really t

We have that in supermarkets in the northeastern US. It's great about half the time. The other half, they make you bust out the calculator unless you really trust your mental arithmetic. The small one is priced per liter, but the big one is priced per gallon. The big one is priced per pound, the small one is priced per ounce. I really wish more people cared about this, because the obvious solution (mandating SI units) would help finally move us toward metric...