JU 88 carries bombs in:
500 kg (1,102 lbs)
250kg (551 lbs)
50 kg (110 lbs)
3 X 500kg = 1,500kg = 3,306 lbs --- that's salvo 1 from a flight of 3 JU-88's, and enough to drop 1 hangar if you are accurate.
The 50 kg's need to hit on target, as they have very limited blast radius. Need a lot of them for hangars, but only a few for each building or strat target you go after. They are also useful for hitting 'soft' hangars.
Best way for accuracy is to fly level, fly at a throttle setting that keeps the plane at consistent altitude. Most bombers flying level at full power still tend to gain altitude, which throws off your bomb site calibration. About 70-80% power in level flight on the run into the target is about right. Do it early to let the speed settle down. Do a long calibration when possible once you are on target and level. External view from the rear, or 'look up' from bomb site can help you line up on target before it is visible in bomb site itself. Use L and J keys for course corrections on bomb run.