>>508254162>>508254561B2's can carry 2 GBU-57's each. So 30 would be 15 B2's
Also you're wrong.
Empty weight: 158,000 lb (71,700 kg)
Gross weight: 336,500 lb (152,200 kg)
Max takeoff weight: 376,000 lb (170,600 kg)
Fuel capacity: 167,000 pounds (75,750 kg)
Essentially if they skimp on fuel they can carry 2 GBU-57's.
Armament
2 internal bays for ordnance and payload with an official limit of 40,000 lb (18,000 kg); maximum estimated limit is 50,000 lb (23,000 kg).[76] Ordnance options carried include:
80ร 500 lb (230 kg) class bombs (Mk-82, GBU-38) mounted on Bomb Rack Assembly (BRA)
36ร 750 lb (340 kg) CBU class bombs on BRA
16ร 2,000 lb (910 kg) class bombs (Mk-84, GBU-31) mounted on Rotary Launcher Assembly (RLA)
16ร B61 or B83 nuclear bombs on RLA (strategic mission)
Standoff weapon: AGM-154 Joint Standoff Weapon (JSOW) and AGM-158 Joint Air-to-Surface Standoff Missile (JASSM)[179][180]
2ร GBU-57 Massive Ordnance Penetrator