A baker uses two types of flour: all-purpose flour and bread flour. All-purpose flour costs per pound, and bread flour costs per pound. The baker buys pounds of all-purpose flour and pounds of bread flour. The total cost, in dollars, is represented by the equation . In this equation, what does the term represent?
The total number of pounds of flour purchased.
The cost per pound of all-purpose flour.
The total cost, in dollars, of the bread flour purchased.
The total cost, in dollars, of both types of flour.
