You can't feel the effects immediately when it comes to foreign exchange! It will take 1 to 5 years to feel it. How about 12 VAT, did you feel the effects dayon upon the signing of the law?
Why you can't feel the effects of the foreign exchange immediately? Because of
currency hedging.
From
http://www.ees.net.nz/forex.htm
If your business does regular international business, you may implement a "hedging" strategy. This can be done in many ways, typically a business will buy a year's worth of foreign currency at a set rate. Whatever is the rate, it prevents fluctuations in a currency to affect the budget of the business.
Sa wala mo kasabot about foreign exchange, better study Economics 101. Ahh wait, there is no economics for commies. No?