> Except when it, of course, isn't. $10M is certainly not ten megadollars. The unit of currency is the dollar. There is no units of currency that corresponds t

> Except when it, of course, isn't. $10M is certainly not ten megadollars. The unit of currency is the dollar. There is no units of currency that corresponds to 1M dollars. The SI system of units devised a systematic way to define derived units that reflect a certain amount expressed in the base unit. Currency don't have the benefit.