Prices show in udef instead of USD

[spyderwebdesign]

My shop has three vendors and all three have their currency set to United States Dollar. The three vendors are set as storeadmin. My account is the only superadmin account. Every single parent item in my store has it's vendor set to one of the three vendors.

All my prices are showing as udef instead of USD. Does anyone know how to change the pricing to United States Dollar?