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ExchangeRateCM is a utility for easily converting text selections in any application that supports contextual menus from US Dollar to various other currencies and vice versa.
Control click on a numerical text selection to expose the contextual menu. Only numerical selections will yield menu items that correspond to ExchangeRateCM. These menu items are labelled "<selection> in USD", for converting to US Dollar, and "<selection> USD in" for converting from US Dollar.
Selecting items from either of the two menus puts the converted value onto the clipboard so you can replace the text selection with the conversion or copy it elsewhere.
Universal Binary, Mac OS X 10.4 and above.