I did the 15-Day in Addison the beginning of January. DPE cost was $800.00, and some may vary slightly. Also if you get a FAA Inspector instead they are free so you could request an inspector. Depending on your experience you may spend more than the quoted cost. Almost everybody in my class finished in 4 flights for the sign off. In this case you will be good on money, but you also have to pay for the rental of the 172RG for the actual check ride, so add that to DPE costs.