Cash discount in Payment terms more than 3 slabs in OBB8

Hi,

Without customization how can we configure the following payment  terms in T-code : OBB8

1   to 15 days   ..  1 %

16 to 30 days   ..  2 %

31 to 45 days   ..  3 %

46 to 60 days   ..  4 %

61 to 75 days   ..  5 %

76 to 90 days   ..  6 %

Thanks & Regards

Abdul Jabbar