Easy fix! Keep in mind you can edit all these templates by:
1. Browse to Manage Fulfilment > Setings > Email and Order Templates
2. Select Order Templates from the left options
3. Select Configure for Purchase Order Print (PDF)
4. Select the Customize Template option on the left and check Customize default template.
You can edit your HTML.
However, I did this for you and attached the HTML in the text file here. Copy it, paste it over you current one, and save.