pre_text: .
post_text: the impact on earnings of the foregoing assumed 10% ( 10 % ) change in each of the periods presented would not have been significant . revenue included $ 100.8 million and operating income included $ 9.0 million of unfavorable foreign currency impact during 2012 resulting from a stronger u.s . dollar during 2012 compared to 2011 . our foreign exchange risk management policy permits the use of derivative instruments , such as forward contracts and options , to reduce volatility in our results of operations and/or cash flows resulting from foreign exchange rate fluctuations . our international operations' revenues and expenses are generally denominated in local currency , which limits the economic exposure to foreign exchange risk in those jurisdictions . we do not enter into foreign currency derivative instruments for trading purposes . we have entered into foreign currency forward exchange contracts to hedge foreign currency exposure to intercompany loans . as of december 31 , 2012 , the notional amount of these derivatives was approximately $ 115.6 million and the fair value was nominal . these derivatives are intended to hedge the foreign exchange risks related to intercompany loans , but have not been designated as hedges for accounting purposes. .
table: Currency 2012 2011 2010
table: Real $40.4 $42.4 $32.5
table: Euro 27.1 26.4 18.6
table: Pound Sterling 18.5 17.6 9.0
table: Indian Rupee 4.3 3.6 2.6
table: Total impact $90.3 $90.0 $62.7
question: Analyse this data from a financial earnings document. what is the unfavorable impact in the operating expense in 2012 resulting from a stronger u.s . dollar?