You should really check out some brewing software, it makes calculating hop additions very easy. I use ProMash and threw this together, amounts listed are for a 12g batch:
Hops
Amount Name Form Alpha IBU Boil Time
-----------------------------------------------------------------------------
1.00 oz. Warrior Pellet 17.00 32.4 60 min.
1.50 oz. Chinook Whole 13.00 17.2 30 min.
1.00 oz. Centennial Whole 10.50 4.9 15 min.
1.00 oz. Chinook Whole 13.00 6.0 15 min.
1.00 oz. Cascade Whole 5.75 2.7 15 min.
1.00 oz. Centennial Whole 10.50 3.0 5 min.
1.00 oz. Chinook Whole 13.00 3.8 5 min.
1.00 oz. Cascade Whole 5.75 1.7 5 min.
1.00 oz. Centennial Whole 10.50 0.0 0 min.
1.00 oz. Chinook Whole 13.00 0.0 0 min.
1.00 oz. Cascade Whole 5.75 0.0 0 min.
Then throw in some more for dry hopping, whatever floats your boat. ProMash has that pegged at just over 70IBUs. Pretty hard to go wrong with those hops, you'll get a tasty IPA for sure.