Why did food prices drop after the black death swept through western Europe?

Duh there were more food than people bc they were all dead

It's because back then people didn't really give attention that food could go rotten or spoiled, so they just decided to be careless and sell old or spoiled products out to the public, and after that people got diseases or sometimes even death. The people had much more awareness after this and dropped food prices if it is spoiled or unsanitary to eat.