Interest Rate Risk The fair value of our cash and cash equivalents that were held primarily in cash deposits would not be significantly affected by either an increase or decrease in interest rates due to the short-term nature of these instruments. We do not expect that interest rates will have a material impact on our results of operations. Interest expense under our Revolving Credit Facilities is historically immaterial. Foreign Exchange Risk We generate revenues in eight currencies, including the Euro, U.S. Dollar and Pound Sterling. While most of our sales are dominated in Euros, we have a significant amount of sales denominated in U.S. Dollars and Pound Sterling. As a result, our revenue may be subject to fluctuations due to changes in foreign currency exchange rates, particularly changes in U.S. Dollars and Pound Sterling. Our foreign exchange risk is less pronounced for Cost of sales, exclusive of depreciation and amortization and operating expenses. Approximately 90% of our purchases are denominated in Euros and approximately 59% of our employees are located in Germany or other Eurozone countries. To reduce our foreign currency exposure risk, we hedge our foreign currency exposure in five major currencies, including the U.S. Dollar and Pound Sterling. Our hedging strategy does not eliminate our foreign currency risk entirely and our hedging contracts typically have a duration of less than one year. ​