Explain whether Delta Airlines' sales are likely to fluctuate more or less than the sales of each of the following firms as the economy moves from recession to expansion and back to recession

Whirlpool Corporation (appliance manufacturer)
Taco Bell
The Boeing Company (aircraft manufacturer)
GameStop (video game sales and rentals)

Delta's sales are likely to fluctuate during the business cycle less than the sales of Whirlpool and Boeing, but more than the sales of Taco Bell and GameStop. Appliances and aircraft are expensive durable goods that are sensitive to changes in economic conditions. On the other hand, fast food and video games are relatively inexpensive consumer goods that are relatively less sensitive to changes in economic conditions.