I'm making a level 1 Half-Orc Unchained Barbarian, with an 18 STR and power attack. I took the tusked racial trait, giving him a 1d4 bite attack to go along with a 1d12 great axe.
How would I calculate the following attack bonuses and modifiers for the following situations? I'm a bit confused on the specifics of the inclusion of bite attacks. I'll include my attempts in figuring them out.
Single great axe attack with power attack
+4 attack (+4 STR, +1 BAB, -1 Power Attack)
1d12+9 damage (+4 STR, +2 2-Hands, +2 Power Attack, +1 2-hand power attack)
Single bite attack with power attack
+4 attack (+4 STR, +1 BAB, -1 Power Attack)
1d4+6 damage (+4 STR, +2 Power Attack)
Full power attack with Great Axe and Bite
+4 axe attack (+4 STR, +1 BAB, -1 Power Attack)
1d12+6 axe damage (+4 STR, +2 Power Attack)
-1 bite attack (+4 STR, +1 BAB, -1 Power Attack, -5 secondary)
1d4+4 bite damage (+2 half STR, +2 Power Attack)
I'm assuming the Unchained Rage adds +2 attack and +2 damage to all of those calculations?