[. . . ] This product, including acessories, may change due to upgrading without prior notice. If is registered, or in case of nonadditive/non-subtractive calculation, this function will not be applicable. [. . . ] If is registered, or in case of nonadditive/non-subtractive calculation, this function will not be applicable. This calculator is equipped with a Resume Function to restore the calculator's status prior to the Auto Power Off; simply press the Before starting calculations, press to clear (zero-clear). The position of any switch that is not specificaly designated, may be set to any position. The conversion rate can be set/changed for each indicated rate, and that rate will be used for conversion calculations. For expressing calculation examples, only the symbols that are required for explanation are mentioned. The conversion rate figures can be set or changed up to 6 (not counting the * keys, 3 different conversion rates can be set. To perfom a tax calculation, first it is absolutely necessary to set and check the tax rate. ) A tax rate can be set (or changed) with a number containing up to four digits. However, the set tax rate may be changed or lost if the battery is consumed largely. Perform two calculations using $840 and $525, both of F543210A which already include tax. [. . . ] However, the set tax rate may be changed or lost if the battery is consumed largely. Perform two calculations using $840 and $525, both of F543210A which already include tax. [. . . ]