A baker uses two types of flour for a large order: whole wheat and all-purpose. Whole wheat flour costs $2.50 per kilogram, and all-purpose flour costs $1.80 per kilogram. The total cost for the flour used in the order was $297. The equation represents this situation, where is the number of kilograms of whole wheat flour used and is the number of kilograms of all-purpose flour used. Which of the following is the best interpretation of in this context?
The total cost, in dollars, of the all-purpose flour used.
The number of kilograms of whole wheat flour used.
The number of kilograms of all-purpose flour used.
The price per kilogram of all-purpose flour.
