This is a fun exchange rate activity that was set up especially for girls, the boys in your class might not appreciate the content so much. It was designed for a class where each learner has access to the internet, in order to look up the exchange rates, however, it can easily be adapted by providing the learners with a list of the necessary exchange rates.
It is important to emphasise that the answers to the questions are not very important (you can just type it into Google and get the answer) the point of the exercise is to show your steps. This is also why I did not include a memo since the answers change from day to day. All you do to get the memo is to type the prices into Google while the learners are doing the activity.