A store sells two types of coffee beans, dark roast and medium roast. The equation represents the total revenue, in dollars, from selling pounds of dark roast and pounds of medium roast. What is the best interpretation of the number in this equation?
The total revenue, in dollars, from selling medium roast.
The total number of pounds of dark roast sold.
The price per pound, in dollars, of dark roast.
The price per pound, in dollars, of medium roast.
