[ic] minimum order quantity

[Dave Turk]

I have searched the archive but have not found any usefull info on minimum
order quantity.
I guess I'm just looking for ideas.
I have a customer who sells hats, mugs, shirts ect...
(SKU - SA5) mugs are 10.99 each minimum order quantity is 36
or
Quantity 36-143 = 10.99 each
and
Quantity 144 & > = 7.99 each

In Interchange I could use

CommonAdjust   pricing:master:  ;:price

pricing table

    sku             master
    SA5           pricing:q36,q144

but how could I stop them from ordering less than 36.
Has any one else visited this delama and if so can you
offer any hints as the best way to approach it.
Thanks very much
Dave Turk