Complely remove jailbreak before sending to Apple

[Koetje]

Hi dudes

I ****** up my screen today (1 huge crack).
The upper part works, but the lower part doesn't work (impossible to unlock)

Now I'm going to send it to Apple (out of warranty, hope they will accept it) but I want to completly remove my jailbreak?

I've restored it to 4.3.3 via iTunes.

What should I do to remove all the jailbreak files so Apple can't see I jailbroke it?

[Mes]

You're done. Restoring to stock firmware is perfect.

[Koetje]

I hope so.

Do you have any clue how much it would cost to get it repaired/replaced?
The ipod is out of warranty.
In euros please