1) How much does it cost to unlock a k800i phone? Is it dependent on the number of locks shown in the secret menu?

2) Does the cost come with the ability to downgrade to CID52?

3) Reason I'm asking is because I would like pay only 10Euro if possible to unlock my k800i and downgrade it.

4) What does this mean: DB2020 & DB2012 y PDA DB2000 - 1 LOG = 3 unlock - (0.33 logs each phone) *

Thanks