I guess it's treated like physical units and pseudo-units: 0,5l of beer with 5% alcohol for 3,50€, that makes sense, no? ;) (IIRC German typography says one sh

I guess it's treated like physical units and pseudo-units: 0,5l of beer with 5% alcohol for 3,50€, that makes sense, no? ;) (IIRC German typography says one should put a half-space between quantity and unit, and if that is unavailable, no space.)