Please help me check my capacity math

Please help me check the math on my trucks’ ability tow my TT.

My TT:

4900 lbs total
550 lbs tongue weight

My truck:

GVWR: 7200lbs
Max Towing: 8800lbs
Truck weight without passengers and a full tank of gas: 5890lbs

So here is my math:

(7200-5890) - 550 = 760

So I would have 760lbs for passengers and all of our other stuff?

That math dont work well..

What truck do you have?
Whats the sticker on the door jam say your payload rating is?
Where did you get that tongue weight from? If advertised on a camper specs that will increase 200lbs or more. Batterys, propane, and stuff.

Seperate axle weights on the truck vs the axle weight rating on the door jam sticker will get you exact capacity.

but there are a lot of variables.