A company sells two types of coffee beans, Arabica and Robusta. The equation represents the total cost, in dollars, of ordering pounds of Arabica beans and pounds of Robusta beans. Which statement is the best interpretation of 4.5 in this context?
The number of pounds of Arabica beans.
The cost per pound of Arabica beans.
The total cost of the order.
The cost per pound of Robusta beans.
