Everyone knows the benefits of online registration, but the costs can be brutal. Depending on the application, your overall volume, and the terms of your credit card processing agreement, pricing tends to average between $8 and $15 per attendee — but many a group has seen much higher costs. Those dollars may be well-spent, but can you prove it? How do you calculate the return on investment from your online registration system? Could you improve that return by better controlling costs?