urgent help

[mlashin]

hi forall
i have case to make imlementation
this case about industrial company for ceramic product
our productis consists of classes as 40*40
andevery class consists of models as ega 40*40 beig
the model is consists of
first 3 grade as I ,II , III
second tones which mean tone of color
third
caliber whichmean class 40*40 can be 40.1*40.1 or 39.9*39.9
-every cutomer group have price list
-price chang by grade but not change by tone or caliberbut these is important to us when we make reservation of item at sales order bcose the all qty of order mustthe same tone and caliber
thanks and wait