No you should because this has been brought to your notice before
What you doing is spamming
Made a thread and asked of the price in 2009 and now in 2011.
This could have been asked in the same thread and if you had read it
Then it would have been possible for you to get answers to your question with some help that was shared in the thread.
If you continue in this direction there's a likelihood you would get tagged for spamming if you lucky.
Two word should atleast be enough for the wise.
This is only the second thread in this theme, though, I agree that that same question could be asked on the previous one, or just to recreate into the "Calculations" thread or something, if OP is eager to ask math, though it can be done by himself, so the topic is there just to be answered in 5-10 minutes
If there would be more of such, then, yeah, it's obvious that it's done for things you described.