Under the Nitro PDF Volume Licensing Program, the price you pay for each Nitro PDF product software license is determined by the size of your initial order. The levels are as follows:

You may obtain additional licenses at the same license fee level of your initial order for two years. Even if you order a single copy, you get it at your current VLP price level. Additionally every license you purchase, in whatever quantity, counts towards calculation of your price level, and graduation to a new level is automatic and immediate. For example, if your initial order was for 25 copies of Nitro PDF Professional, then all further purchases you make will be at the Level A discount until your total purchases (including the initial 25) total 50 licenses — then your 51st and subsequent purchases will be at the Level B discount.