On one hand numbers don't change but on the other you are left with no information about what rates were used for conversions. From a billing perspective this is a big issue since every accountant needs exchange rates. WHMCS doesn't give this information so in your example your accountant needs to manually retreive EUR/USD rate based on invoice date. The problem is that not only this is a boring process but also doesn't work properly due to currency fluctuations. The thing is that your acco