Reibun
、！：。、！

Hey, that's way too much of a rip-off no matter how you look at it! 6:4 is the best you'll get. And the 6 is mine, obviously!

Literal

You, that [topic-は] no-matter-what overcharge too-much [copula-だろ]! 6:4 [subj-が] good-place [copula-だろうが]. Of-course, 6 [topic-は] me [emph-な]!

ボッタクリ 'rip-off / overcharging' is slang from ぼったくる 'to rip off.' いくらなんでも 'no matter how you look at it / by any standard' sets an absolute limit. ６：４がいいとこ 'the best (fair split) would be 6:4' uses いいところ 'at best.' The speaker demands the majority share and announces it preemptively with もちろん 'of course.' Brash, argumentative masculine speech.