- Navigate to Communities > Special Events > Friends Asking Friends > Kintera Thon
- Hover over the event
- Select Website info
- Click Fee Structure
- Mark the box to Enable and fill out Additional Fees option.
- Navigate back to the Webinfo Checklist and click Publish This event now.
Note: This option will only allow you to purchase up to two additional t-shirts. Each additional fees (two of them) will have a fix cost. Registrants will have no control on how many extra t-shirts they want.