To setup pricing condition records

Hi Gurus,

Kindly help me in setting up discount condition records.

Ex:- Material A full load = 100L and for each multiply of this quantity a 3% discount should be given.

With the available scales maintenance possibilities this not working as it triggers 3% for every quantity above 100L but we only need it for 100 L, 200 L, 300 L, etc.

Kindly assist me in setting up these records.

Thanks

RK