Unit of account L.S.D units in ratio 240:12:1. The Florentine gold florin, the French franc and the electoral rheingulden all became pounds (240 denari) of account. Units of account would often survive over 100 years despite the original coins changing composition and availability (e.g. the Castilian maravedi). A modern unit of account is the European Currency Unit, used in the European Union from 1979 to 1998; its replacement in 1999, the Euro, was also just a unit of account until the introduction of notes and coins in 2002. Unit of account is the main way of calculating a carrier or ship owner's liability
International status and usage of the euro considering making the euro a third official currency of the country to go along with the US dollar and the Balboa. In various countries the euro is accepted by some merchants albeit not being official currency there. Additionally sometimes it is used for pricing purposes even if the actual payments are made in the official currency (e.g., for real estate). The Swedish town of Höganäs has, since 1 January 2009, generally allowed shop payments in euros alongside the Swedish krona. Widespread usage, though unofficial, is also present in towns such as Haparanda, on the border with Finland. The euro is