Possible Error

[joym999 at aol.com]

No: HPFGUIDX 11999

I found what I feel is (sort of) an error on JKRs part.  In SS/PS, 
chapter 5, the first time Harry goes to Diagon Alley, with Hagrid.  
They pass a witch selling dragon livers for 17 sickles an ounce 
(Theyre mad!).  This is on page 72 of the Scholastic PB edition.  
Several pages later (pg. 75 of the Scholastic PB edition) Hagrid 
explains to Harry how wizard money works - as we all know, there are 
29 bronze Knuts in a silver Sickle and 17 Sickles to a gold Galleon.  
But if 17 Sickles = 1 Galleon, why say that something cost 17 
sickles?  Isnt that like saying that something cost 100 cents?  I 
think this is an oversight on JKRs part.  And if you think I must be 
really insane and desperate to have been reduced to this level of 
nitpicking, you are absolutely right.

--Joywitch