that includes materials which arent super cheap.
thats shingles, ice & water shield, frip edge, flashing, nails, dumpster, ridgevent or roof vents.
then you got labor for stripping and labor for installation.
then they will factor in difficulty.
my roof isnt super easy, being a 4-hip into a 2-hip.
it wont be too hard to do, but it wont be easy either.