Alright, I'm a Phantom ranger archer
A C bow costs you approximately 5 / 6KK, but beware, there is a lot of price disparity in Giran stores, the top C Eminent bow can be found from 8 to 15kk, a non-top B bow, around 8KK, and the top B bow of peril, 10 / 15KK
A Carnage A bow, 15 / 20KK, but I recommend you to start a BoP (although you see them at the same price) since with an A bow you will have to buy the A quiver (as expensive as the bow) and you will spend more SS
I hope the information helps you