 The convenience store chain 7 @-@ Eleven transformed 11 of its stores in the U.S. and one in Canada into Kwik @-@ E @-@ Marts , at the cost of approximately $ 10 million . 7 @-@ Eleven also sold Simpsons @-@ themed merchandise in many of its stores . This included " Squishees " , " Buzz Cola " , " Krusty @-@ O 's " Cereal , and " Pink Movie Donuts " . This promotion resulted in a 30 % increase in profits for the altered 7 @-@ Eleven stores . Homer performed a special animated opening monologue for the July 24 , 2007 edition of The Tonight Show with Jay Leno , as part of another promotion . 
