"There are certain fixed costs when you own a plane,' [Andre] Agassi explained during a break in the action at the Volvo/San Francisco tennis tournament,'so the more you fly it, the more economic sense it makes..... The first flight after I bought it, I took some friends to Palm Springs for lunch." (Scott Ostler, "Andre Even Flies Like a Champ,", " San Francisco Chronicle, February $8,1993,$ C1. Discuss whether Agassi's statement is reasonable.