We try to deliver as close to the exact number of units ordered as possible, but it's important that you allow for as much as 5% over or under that number. The reason for overruns and underruns is this: all CD plants manufacture a bit more than you order, then discard any copies that don't meet quality standards. If there are more discards than we expect, you'll receive fewer copies than you ordered; if there aren't many discards, you'll receive somewhat more. You will only be charged for the exact number of CDs or DVDs you receive. Don't want to pay for overs? Simply prepay your order in full and they're free!