I know it's a toy example, but it's a _really bad idea_ to use a float as a backing type for currency. https://stackoverflow.com/questions/3730019/why-not-use-

I know it's a toy example, but it's a _really bad idea_ to use a float as a backing type for currency. https://stackoverflow.com/questions/3730019/why-not-use-double-or-float-to-represent-currency https://stackoverflow.com/questions/3730019/why-not-use-doub...