OK, how much is it?
nPricing –Discounts common – Why?
–Large orders more profitable and everyone knows it! Customers demand quantity discounts.
–Trade discounts also given to specific customers
–Contracts given for specific jobs.
§http://www.redlinegraphics.com/contract.htm 
nCan be very hard to automate since it is variable
–http://www.processacesoftware.com/volume_pricing.html