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.