How much is a pound of coffee at Dunkin Donuts?

Depends on the kind of roast and the species of coffee that are used in your bag of coffee beans. Arabica beans tend to be on the "pricier" end because they're much more difficult to grow but taste better (comparatively) than robusta, which is typically inexpensive, and are available in instant coffee or in specific brands in certain areas of the world that are known to grow them (i.e. Vietnamese coffee)