Australian banknotes cash currency dollars money various denomination potential value various denominations wealth canada change coin coinage coins colorful decimal dollar dough euro europe green note notes soiled used appearance cambodian Cambodian-riel color colored colors colour coloured colours denominations finance Khmer-currency KHR monetary numismatics riel security success textures values variations variety various banknote banknote-features changes collectors features five-dollars introduced monetary-value New plastic replacing superceding superseding