[Biturbos4] Intereference Engine in B5 S4?

[Doug Johnson]

I'm looking into the possible purchase of a 2000 S4 that has no record of timing belt and whatnot having been replaced.
 
Can I ask if this car has an interference engine, and what a typical, independent, Audi-familiar shop charges for timing belt replacement, and all else that should be done in a "typical" timing belt replacement job?
 
Thanks!!!

Regards,

Doug