Why are Trader Joe's eggs so cheap?

I've noticed that Trader Joe's eggs are consistently priced lower than other grocery stores. Could you explain the reasoning behind this? Are they sourcing their eggs from a different supplier that allows for a lower cost? Or is there some other factor at play, such as a higher volume of sales that allows for a price reduction? I'm curious to know the specifics behind why Trader Joe's is able to offer such a competitive price on their eggs.