what does ..-£ mean ?? (help converting prices)

[Lulu]

-£180 per kg......... how much is this in american currency ???

i weanna buy sum shit and have no ida how to covert

please help

Live mid-market rates as of: Friday, January 28, 2005 - 6:36:23 PM EST
180 GBP
Great Britain Pound
1 GBP = 1.8876 USD
=
339.759 USD
United States Dollar
1 USD = 0.5298 GBP