I operate a BA and all i can tell you is...............A LOT !!! About double that at least of a 206 , and when it comes to the engine side.....well you are bent over and R****ed by Turbomeca....circa £200,000 if you are unfortunate enough to have FOD damage and have to have an exchange !! I can buy around 7or8 allison C20 engines for that. I cannot imagine a B2 will be much different.........great machine though!