Feyrah Appliance Sales Corp. recorded sales of the following appliances for the past

three years as follows:

Refri erators Stoves Dishwashers 2018 Number 300 500 200 Price $ 1,000 $ 750 $ 500 2019 Number 500 600 425 Price $ 1,100 $ 800 $ 600 2020 Number 600 700 500 Price $ 1,200 $ 830 $ 700