jMe - Refactored to move sales tax calculation into its own class. SalesTax understands when to apply, and how much to apply
jMe - Minor refactoring. Dont need to pass as a variable as have access to the instance variable
jMe - Introduced the concept of line item that understands the number of products being purchased, and understands how to print them for the reciept
jMe - Renamed the Item to Product, as that makes more sense to me
jMe - Introduced import duty. Also, product knows how to represent itself
jMe - Removed all traces of item. Renamed all local variables to the new name of product