Buying a second item has an increased shipping cost of ~10%. So if, say, a 5lb bag has a $10 shipping charge, buying 2 x 5lb bags will only be $11 (1 dollar more)! And this goes for a third or fourth item too.
Special! Case of 8 X 1 LB Bags + FREE SHIPPING !
Case of 5lb bags (40 pounds) - $2.99/ lb - Free shipping