Peanuts by Charles Schulz for August 26, 1970
Transcript:
Snoopy stands on the doghouse and wears an apron. He thinks, "Checker on two!"<BR><BR> Snoopy continues to think, "What's the score on this new grape jelly?"<BR><BR> Snoopy thinks, "Carry out!"<BR><BR> Snoopy thinks, "We check-out clerks do a lot of yelling . ."<BR><BR>
Can confirm as I too am a world famous grocery clerk, that there is indeed still a lot of yelling.