Calvin and Hobbes by Bill Watterson for March 27, 1989
Calvin: Phooey. No bugs in the bus window. Susie: I can't believe you're doing this. Calvin: Hey, ask that kid if he's got any bugs in his window. Susie: Calvin, there is no way you're going to complete an insect collection on the way to school! Forget it! Calvin: Sighhh...well, maybe you're right. How much do you want for your collection? I'll give you a quarter...or here, 30 cents. Susie: I spent a month on this!