He deals in dairy

Merp was hungry.  

Skyler possessed macaroni and cheese.  

Merp offered a transaction:  one dollar for a cup of "college gold".  

Skyler said that his goods were worth no less than $1.69 apiece.  

Merp tried to give Skyler coins.  

Skyler threw them in Merp's face, saying, "They will sit on my dresser and then I will lose them."  

Merp had to find another way to compensate.  Fortunately, the starving artist is never at a loss.