Simple Q&A D&D 3.5 (by RAW) XXVII

[Platymus Pus]

Q507
With the spell longshot(+10),ranged weapon mastery(+20),(+120) range weapon, Far Shot (1.5),Distance enhancement (x2),hawkeye ( x2), + crossbow sight (treats enemies a +2 range increment closer past first two)
Would I result with a 675 foot range increment with these things and would it result in 8100 feet at the 12 increment it gives?
I see nothing in the spells or anything in general saying these don't stack.