title: What is the best django model field to use to represent a US dollar amount?
body: <p>I need to store a U.S. $ dollar amount in a field of a Django model.  What is the best model field type to use?  I need to be able to have the user enter this value (with error checking, only want a number accurate to cents), format it for output to users in different places, and use it to calculate other numbers.</p>