Now I need complex combination for shipping.
SubTotal of items <=99.99 with flate rate $10 and "brand' has a value of "1" is "0" (Adidas id 1) and "brand' has a value of "2" is "0" (Puma - id 2) and "category'' has a value of "1" is "0" (soccer - id 1) and "category' has a value of "2" is "0" (basketball - id 2).
In other words: flate rate is $10 for products not from Adidas soccer, Adidas basketball, Puma soccer and Puma basketball.
Thanks!