Are the HUB Tie Rod Replacement & Wheel bearing Replacement all ONE job?

What is your question?

I took my car in to one of the companies I found on RepairPal for: 1) Front left wheel bearing replacement (2) power steering hose replace. Its 10 yrs old 171,000 miles. They recommended their over all exam of car $88. I agreed. No problem. However, I am confused with the billing. They are charging: $541 for Tie Rod Assembly $264 for new Hub(it houses the assembly? $428 Wheel bearing replacement (includes $158 4 wheel alignment) $422 Power Steering Hose Replacement $1540 is the total? Please explain: If they are replacing the entire "HUB" why all the separate billing? I asked for an estimate showing Parts then separate Labor but they give separate sheets This is what they showed: Wheel Bearings $330. HUB $264 4 wheel alignment $158 Assessment $ 88 3 Hose replacement $ Incidently, he said the hoses cost $70 $78(labor) It feels as tho there is an extra $300-$400 extra charge in here somehere. Pleasse help me understand.