Import duties are imposed at a specific rate, an advalorem rate, or at a compound basis. The base of the ad valorem rate is determined by the domestic value (‘true market value’) of the imported good, calculated at the official exchange rate. The true market value of the goods is the wholesale cash price (duties excluded) for which similar goods would be sold and thus the prices actually paid or payable are used. The compound basis is a combination of the two others rates, very Thai and simple: “whichever of both gives the highest amount of duties, will be the rate applied