It defiantly depends on the style of clothes you are wearing. If you wear stuff like Ralph Lauren or Hollister, you will be racking up a bill in no time.
If you are buying $5 and $10 shirts from Wal-Mart, it takes a lot longer to run up the bill. So yeah, the ammount of style you have, and what kind of style it is, does defiantly make a difference.
I wear Aéropostale almost every day. Earlier this month before school started, I racked up a bill for $564.
I would say Girls spend the same ammount of money as guys do, but like I said, it varies.