How much does the falcon htv-2 cost?

The Falcon HTV-2 (Hypersonic Technology Vehicle 2) was a research vehicle developed by DARPA to test hypersonic flight technologies. While the exact cost of the HTV-2 program is not publicly detailed, the overall budget for DARPA's hypersonic programs has been in the hundreds of millions of dollars. The focus of the HTV-2 was on testing capabilities rather than production, so specific per-unit costs are not readily available.