If every car sold last week at a certain used-car dealership was either a coupe or a sedan, what was the average (arithmetic mean) sale price for all the cars that were sold at the dealership last week?
(1) The average sale price for the sedans that were sold at the dealership last week was $10,600.
(2) The average sale price for the coupes that were sold at the dealership last week was $8,400.