With that loadout, you are carrying 2000+562+1560+3978 = ~6700lbs of destruction 
It does add up. Some time ago I compared the heavy hitters in the game in terms of direct fire ground attack aircraft. keep in mind this list is only a "total damage available to be handed to enemy OBJ" set of numbers and does not take in to consideration damage over time or the ability of the aircraft themselves. Obviously, the heaviest hitters do not always make for the best platform for a specific duty.
B25H = 9392 lbs (6/500lb, 3200rd in 8/.50 cals, 21rd 75mm HE)
Bf110g-2 = 8515 lbs (2/550kg, 4/50kg, 255rd in 2/30mm, 750rd 2/20mm)
P47D-40 = 7398 lbs (2/1k, 1/500lb, 10/5in rkt, 2800rd in 8/.50 cal)
Me410 = 7349 lbs (1500rd in 6/20mm, 2200rd in 4/13mm)
A20 = 6953 lbs (8/500lb, 2100rd in 6/.50 cal)
Mossi FB Mk IV = 6352 lbs. (2/500lb, 8/3in rkt, 700rd 4/20mm, 3120rd in 4/.30 cal)
For comparisons sake:
IL-2 = 3472 lbs (4/100kg, 4/132 rkt, 100rd 37mm, 1500rd in 2/.30cal)
P51D = 5136 lbs (2/1k, 6/5in rkt, 1880rd in 6/.50cal)
P38L = 6505 lbs (2/1k, 10/5in rkt, 150rd in 1/20mm, 2000rd in 4/.50cal)
Typhoon = 4256 lbs (2/1k, 560rd in 4/20mm)
George = 4701 lbs (2/250kg, 900rd in 4/20mm) [rather the N1K2 "nikki" for you newbs

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